diff --git a/compiled-ODD/guidelines-de-wegaDocuments.compiled.xml b/compiled-ODD/guidelines-de-wegaDocuments.compiled.xml
index 32363401..51f21330 100644
--- a/compiled-ODD/guidelines-de-wegaDocuments.compiled.xml
+++ b/compiled-ODD/guidelines-de-wegaDocuments.compiled.xml
@@ -14367,7 +14367,11 @@ nominum</soCalled>, o soprannome</desc>
   <listRef>
     <ref target="https://www.tei-c.org/release/doc/tei-p5-doc/en/html/MS.html#msid">10.4. The Manuscript Identifier</ref>
   </listRef>
-</elementSpec><elementSpec rend="change" module="msdescription" xml:id="PHYSDESC" ident="physDesc"><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">physical description</gloss><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">materielle Beschreibung</gloss><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class.</desc><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse.</desc><classes/><content><oneOrMore xmlns="http://relaxng.org/ns/structure/1.0"><choice><ref name="p"/><ref name="accMat"/></choice></oneOrMore></content><attList/><exemplum xml:lang="en">
+</elementSpec><elementSpec rend="change" module="msdescription" xml:id="PHYSDESC" ident="physDesc"><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">physical description</gloss><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">materielle Beschreibung</gloss><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class.</desc><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse.</desc><classes/><content><sequence minOccurs="1" maxOccurs="1"><classRef xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" key="model.pLike" minOccurs="0" maxOccurs="unbounded"/><elementRef xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" key="accMat" minOccurs="0" maxOccurs="unbounded"/></sequence></content><constraintSpec xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" scheme="schematron" ident="empty-physDesc">
+                <constraint>
+                    <sch:assert test="*"><sch:name/> must contain at least one p or accMat element</sch:assert>
+                </constraint>
+            </constraintSpec><attList/><exemplum xml:lang="en">
     <egXML xmlns="http://www.tei-c.org/ns/Examples">
       <physDesc>
         <objectDesc form="codex">
diff --git a/compiled-ODD/guidelines-de-wegaLetters.compiled.xml b/compiled-ODD/guidelines-de-wegaLetters.compiled.xml
index 321d72bc..b54d31bd 100644
--- a/compiled-ODD/guidelines-de-wegaLetters.compiled.xml
+++ b/compiled-ODD/guidelines-de-wegaLetters.compiled.xml
@@ -15299,7 +15299,11 @@ nominum</soCalled>, o soprannome</desc>
   <listRef>
     <ref target="https://www.tei-c.org/release/doc/tei-p5-doc/en/html/MS.html#mscoit">10.6.1. The msItem and msItemStruct Elements</ref>
   </listRef>
-</elementSpec><elementSpec rend="change" module="msdescription" xml:id="PHYSDESC" ident="physDesc"><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">physical description</gloss><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">materielle Beschreibung</gloss><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class.</desc><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse.</desc><classes/><content><oneOrMore xmlns="http://relaxng.org/ns/structure/1.0"><choice><ref name="p"/><ref name="accMat"/></choice></oneOrMore></content><attList/><exemplum xml:lang="en">
+</elementSpec><elementSpec rend="change" module="msdescription" xml:id="PHYSDESC" ident="physDesc"><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">physical description</gloss><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">materielle Beschreibung</gloss><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class.</desc><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse.</desc><classes/><content><sequence minOccurs="1" maxOccurs="1"><classRef xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" key="model.pLike" minOccurs="0" maxOccurs="unbounded"/><elementRef xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" key="accMat" minOccurs="0" maxOccurs="unbounded"/></sequence></content><constraintSpec xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" scheme="schematron" ident="empty-physDesc">
+                <constraint>
+                    <sch:assert test="*"><sch:name/> must contain at least one p or accMat element</sch:assert>
+                </constraint>
+            </constraintSpec><attList/><exemplum xml:lang="en">
     <egXML xmlns="http://www.tei-c.org/ns/Examples">
       <physDesc>
         <objectDesc form="codex">
diff --git a/compiled-ODD/guidelines-de-wegaWritings.compiled.xml b/compiled-ODD/guidelines-de-wegaWritings.compiled.xml
index a47c10d5..da4dfbe8 100644
--- a/compiled-ODD/guidelines-de-wegaWritings.compiled.xml
+++ b/compiled-ODD/guidelines-de-wegaWritings.compiled.xml
@@ -14296,7 +14296,11 @@ nominum</soCalled>, o soprannome</desc>
   <listRef>
     <ref target="https://www.tei-c.org/release/doc/tei-p5-doc/en/html/MS.html#msid">10.4. The Manuscript Identifier</ref>
   </listRef>
-</elementSpec><elementSpec rend="change" module="msdescription" xml:id="PHYSDESC" ident="physDesc"><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">physical description</gloss><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">materielle Beschreibung</gloss><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class.</desc><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse.</desc><classes/><content><oneOrMore xmlns="http://relaxng.org/ns/structure/1.0"><choice><ref name="p"/><ref name="accMat"/></choice></oneOrMore></content><attList/><exemplum xml:lang="en">
+</elementSpec><elementSpec rend="change" module="msdescription" xml:id="PHYSDESC" ident="physDesc"><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">physical description</gloss><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">materielle Beschreibung</gloss><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class.</desc><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse.</desc><classes/><content><sequence minOccurs="1" maxOccurs="1"><classRef xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" key="model.pLike" minOccurs="0" maxOccurs="unbounded"/><elementRef xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" key="accMat" minOccurs="0" maxOccurs="unbounded"/></sequence></content><constraintSpec xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" scheme="schematron" ident="empty-physDesc">
+                <constraint>
+                    <sch:assert test="*"><sch:name/> must contain at least one p or accMat element</sch:assert>
+                </constraint>
+            </constraintSpec><attList/><exemplum xml:lang="en">
     <egXML xmlns="http://www.tei-c.org/ns/Examples">
       <physDesc>
         <objectDesc form="codex">
diff --git a/compiled-ODD/guidelines-de-wega_all.compiled.xml b/compiled-ODD/guidelines-de-wega_all.compiled.xml
index 427616a5..317853f4 100644
--- a/compiled-ODD/guidelines-de-wega_all.compiled.xml
+++ b/compiled-ODD/guidelines-de-wega_all.compiled.xml
@@ -16228,7 +16228,11 @@ nominum</soCalled>, o soprannome</desc>
   <listRef>
     <ref target="https://www.tei-c.org/release/doc/tei-p5-doc/en/html/MS.html#mscoit">10.6.1. The msItem and msItemStruct Elements</ref>
   </listRef>
-</elementSpec><elementSpec rend="change" module="msdescription" xml:id="PHYSDESC" ident="physDesc"><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">physical description</gloss><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">materielle Beschreibung</gloss><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class.</desc><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse.</desc><classes/><content><oneOrMore xmlns="http://relaxng.org/ns/structure/1.0"><choice><ref name="p"/><ref name="accMat"/></choice></oneOrMore></content><attList/><exemplum xml:lang="en">
+</elementSpec><elementSpec rend="change" module="msdescription" xml:id="PHYSDESC" ident="physDesc"><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">physical description</gloss><gloss xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">materielle Beschreibung</gloss><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="en">contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class.</desc><desc xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" rend="replace" versionDate="2013-11-11" xml:lang="de">enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse.</desc><classes/><content><sequence minOccurs="1" maxOccurs="1"><classRef xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" key="model.pLike" minOccurs="0" maxOccurs="unbounded"/><elementRef xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" key="accMat" minOccurs="0" maxOccurs="unbounded"/></sequence></content><constraintSpec xmlns:tei="http://www.tei-c.org/ns/1.0" xmlns:mei="http://www.music-encoding.org/ns/mei" xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns:s="http://www.ascc.net/xml/schematron" scheme="schematron" ident="empty-physDesc">
+                <constraint>
+                    <sch:assert test="*"><sch:name/> must contain at least one p or accMat element</sch:assert>
+                </constraint>
+            </constraintSpec><attList/><exemplum xml:lang="en">
     <egXML xmlns="http://www.tei-c.org/ns/Examples">
       <physDesc>
         <objectDesc form="codex">
diff --git a/schema/de/wegaDocuments.isosch b/schema/de/wegaDocuments.isosch
index 03b046ad..9d1fed8e 100644
--- a/schema/de/wegaDocuments.isosch
+++ b/schema/de/wegaDocuments.isosch
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <schema xmlns="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
    <title>ISO Schematron rules</title>
-   <!-- This file generated 2021-01-13T21:21:05Z by 'extract-isosch.xsl'. -->
+   <!-- This file generated 2021-02-01T09:51:34Z by 'extract-isosch.xsl'. -->
 
    <!-- ********************* -->
    <!-- namespaces, declared: -->
@@ -491,67 +491,73 @@ relatedItem element must be empty</report>
          <report test="not(parent::tei:msPart) and (local-name(*[1])='idno' or local-name(*[1])='altIdentifier' or normalize-space(.)='')">An msIdentifier must contain either a repository or location.</report>
       </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-seg-activeOrPassivePerformance-72">
+   <pattern id="schematron-constraint-wegaDocuments-physDesc-empty-physDesc-72">
+      <rule context="tei:physDesc">
+                    <assert test="*">
+            <name/> must contain at least one p or accMat element</assert>
+                </rule>
+   </pattern>
+   <pattern id="schematron-constraint-wegaDocuments-seg-activeOrPassivePerformance-73">
       <rule context="tei:seg">
                     <report test="./@subtype = ('active', 'passive') and not(./@type = 'performance')">if @subtype contains 'active' or 'passive' @type has to be 'performance'</report>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-seg-AddresseeOrSenderCorrespondence-73">
+   <pattern id="schematron-constraint-wegaDocuments-seg-AddresseeOrSenderCorrespondence-74">
       <rule context="tei:seg">
                     <report test="./@subtype = ('sender', 'addressee') and not(./@type = 'correspondence')">if @subtype contains 'sender' or 'addressee' @type has to be 'correspondence'</report>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-att.witnessed-att-wit-74">
+   <pattern id="schematron-constraint-wegaDocuments-att.witnessed-att-wit-75">
                     <rule context="tei:*[@wit]">
                         <let name="wit" value="@wit"/>
                         <assert test="preceding::tei:witness[@xml:id = substring($wit, 2)]">The @wit-attribute must point at some witness element</assert>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-listWit-only-one-witness-75">
+   <pattern id="schematron-constraint-wegaDocuments-listWit-only-one-witness-76">
       <rule context="tei:listWit">
                     <report test="count(tei:witness) le 1">There should always be more than one witness within a listWit element.</report>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-styleguide-document-node-content-76">
+   <pattern id="schematron-constraint-wegaDocuments-styleguide-document-node-content-77">
                 <rule context="document-node()">
                     <report test="count(processing-instruction()) ne 2">WeGA styleguide error: there should exactly be two processing instructions before the root element</report>
                     <report test="comment()">WeGA styleguide error: there should be no comments outside the root element</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-whitespaceOnlyContent-77">
+   <pattern id="schematron-constraint-wegaDocuments-whitespaceOnlyContent-78">
                 <rule context="tei:surname | tei:forename | tei:persName | tei:author[not(@sameAs)] | tei:occupation | tei:settlement | tei:country | tei:region | tei:rs | tei:workName | tei:characterName | tei:hi[not(.//tei:gap)] | tei:head | tei:note[not(@type=('thematicCom'))] | tei:placeName | tei:title | tei:seg | tei:item[not(@* or *)]">
                     <report test="normalize-space(.) = ''">
             <name/> has whitespace only content</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-elementStartsWithWhitespace-78">
+   <pattern id="schematron-constraint-wegaDocuments-elementStartsWithWhitespace-79">
                 <rule context="tei:surname | tei:forename | tei:persName[not(@type)] | tei:author | tei:occupation | tei:settlement | tei:country | tei:region | tei:rs | tei:workName | tei:characterName | tei:hi | tei:placeName[not(parent::tei:address or parent::tei:birth or parent::tei:death)]">
                     <report test="matches(.,'^\s') and (node()[1] = text()[1])">whitespace at the beginning of element <name/>
          </report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-untrimmedAttributeValues-79">
+   <pattern id="schematron-constraint-wegaDocuments-untrimmedAttributeValues-80">
                 <rule context="*">
                     <report test="some $i in @* satisfies string-length(normalize-unicode(normalize-space(replace($i, ' | | | ', ' ')))) ne string-length($i)">There is some whitespace here at the beginning or end of some attribute value.</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-wegaTargets-80">
+   <pattern id="schematron-constraint-wegaDocuments-wegaTargets-81">
                 <rule context="*[starts-with(@target, 'wega:')]">
                     <assert test="matches(@target, '^wega:A[0-9A-F]{6}(#.+)?(\s+wega:A[0-9A-F]{6}(#.+)?)*$')">"wega"-prefixed URIs must follow the pattern "wega:A002068" (i.e. without any file extension)</assert>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-emojiCheck-81">
+   <pattern id="schematron-constraint-wegaDocuments-emojiCheck-82">
                 <rule context="*[some $i in text() satisfies normalize-space($i) ne '']">
                     <report test="matches(., '[⌚-⌛]|[⏩-⏬]|[⏰]|[⏳]|[◽-◾]|[☔-☕]|[♈-♓]|[♿]|[⚓]|[⚡]|[⚪-⚫]|[⚽-⚾]|[⛄-⛅]|[⛎]|[⛔]|[⛪]|[⛲-⛳]|[⛵]|[⛺]|[⛽]|[✅]|[✊-✋]|[✨]|[❌]|[❎]|[❓-❕]|[❗]|[➕-➗]|[➰]|[➿]|[⬛-⬜]|[⭐]|[⭕]|[🀄]|[🃏]|[🆎]|[🆑-🆚]|[🇦-🇿]|[🈁]|[🈚]|[🈯]|[🈲-🈶]|[🈸-🈺]|[🉐-🉑]|[🌀-🌠]|[🌭-🌯]|[🌰-🌵]|[🌷-🍼]|[🍾-🍿]|[🎀-🎓]|[🎠-🏄]|[🏅]|[🏆-🏊]|[🏏-🏓]|[🏠-🏰]|[🏴]|[🏸-🏿]|[🐀-🐾]|[👀]|[👂-📷]|[📸]|[📹-📼]|[📿]|[🔀-🔽]|[🕋-🕎]|[🕐-🕧]|[🕺]|[🖕-🖖]|[🖤]|[🗻-🗿]|[😀]|[😁-😐]|[😑]|[😒-😔]|[😕]|[😖]|[😗]|[😘]|[😙]|[😚]|[😛]|[😜-😞]|[😟]|[😠-😥]|[😦-😧]|[😨-😫]|[😬]|[😭]|[😮-😯]|[😰-😳]|[😴]|[😵-🙀]|[🙁-🙂]|[🙃-🙄]|[🙅-🙏]|[🚀-🛅]|[🛌]|[🛐]|[🛑-🛒]|[🛕]|[🛫-🛬]|[🛴-🛶]|[🛷-🛸]|[🛹]|[🛺]|[🟠-🟫]|[🤍-🤏]|[🤐-🤘]|[🤙-🤞]|[🤟]|[🤠-🤧]|[🤨-🤯]|[🤰]|[🤱-🤲]|[🤳-🤺]|[🤼-🤾]|[🤿]|[🥀-🥅]|[🥇-🥋]|[🥌]|[🥍-🥏]|[🥐-🥞]|[🥟-🥫]|[🥬-🥰]|[🥱]|[🥳-🥶]|[🥺]|[🥻]|[🥼-🥿]|[🦀-🦄]|[🦅-🦑]|[🦒-🦗]|[🦘-🦢]|[🦥-🦪]|[🦮-🦯]|[🦰-🦹]|[🦺-🦿]|[🧀]|[🧁-🧂]|[🧃-🧊]|[🧍-🧏]|[🧐-🧦]|[🧧-🧿]|[🩰-🩳]|[🩸-🩺]|[🪀-🪂]|[🪐-🪕]')">Text contains characters with Emoji presentation as default.</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-sourceMustResolve-82">
+   <pattern id="schematron-constraint-wegaDocuments-sourceMustResolve-83">
                 <rule context="*[starts-with(@source, '#')]">
                     <let name="source" value="@source"/>
                     <assert test="id(substring($source,2))">Unable to locate the reference provided by the @source attribute.</assert>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaDocuments-att.wega.rend-underline-n-83">
+   <pattern id="schematron-constraint-wegaDocuments-att.wega.rend-underline-n-84">
                     <rule context="*:hi[@n] | *:rend[@n]">
                         <report test="@rend ne 'underline'">The @n-attribute is only supported in combination with @rend='underline'</report>
                     </rule>
diff --git a/schema/de/wegaDocuments.rng b/schema/de/wegaDocuments.rng
index 9f2e08ad..cc3d8515 100644
--- a/schema/de/wegaDocuments.rng
+++ b/schema/de/wegaDocuments.rng
@@ -5,7 +5,7 @@
          xmlns="http://relaxng.org/ns/structure/1.0"
          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
          ns="http://www.tei-c.org/ns/1.0"><!--
-Schema generated from ODD source 2021-01-13T21:21:04Z. .
+Schema generated from ODD source 2021-02-01T09:51:34Z. .
 TEI Edition: Version 4.1.0. Last updated on
 	19th August 2020, revision b414ba550
 TEI Edition Location: https://www.tei-c.org/Vault/P5/Version 4.1.0/
@@ -5612,12 +5612,27 @@ Empfohlene Werte sind: 1] label; 2] data</a:documentation>
    <define name="physDesc">
       <element name="physDesc">
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(materielle Beschreibung) enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse. [10.7. Physical Description]</a:documentation>
-         <oneOrMore>
-            <choice>
-               <ref name="p"/>
+         <group>
+            <zeroOrMore>
+               <ref name="model.pLike"/>
+            </zeroOrMore>
+            <zeroOrMore>
                <ref name="accMat"/>
-            </choice>
-         </oneOrMore>
+            </zeroOrMore>
+         </group>
+         <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
+                  id="wegaDocuments-physDesc-empty-physDesc-constraint-assert-51">
+            <rule context="tei:physDesc">
+               <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
+                           xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
+                           xmlns:s="http://www.ascc.net/xml/schematron"
+                           xmlns:sch="http://purl.oclc.org/dsdl/schematron"
+                           xmlns="http://www.tei-c.org/ns/1.0"
+                           xmlns:rng="http://relaxng.org/ns/structure/1.0"
+                           test="*">
+                  <sch:name/> must contain at least one p or accMat element</sch:assert>
+            </rule>
+         </pattern>
       </element>
    </define>
    <define name="accMat">
diff --git a/schema/de/wegaLetters.isosch b/schema/de/wegaLetters.isosch
index b15b0c2b..69b2c406 100644
--- a/schema/de/wegaLetters.isosch
+++ b/schema/de/wegaLetters.isosch
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <schema xmlns="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
    <title>ISO Schematron rules</title>
-   <!-- This file generated 2021-01-13T21:21:05Z by 'extract-isosch.xsl'. -->
+   <!-- This file generated 2021-02-01T09:51:32Z by 'extract-isosch.xsl'. -->
 
    <!-- ********************* -->
    <!-- namespaces, declared: -->
@@ -501,73 +501,79 @@ relatedItem element must be empty</report>
          <report test="not(parent::tei:msPart) and (local-name(*[1])='idno' or local-name(*[1])='altIdentifier' or normalize-space(.)='')">An msIdentifier must contain either a repository or location.</report>
       </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaLetters-seg-activeOrPassivePerformance-74">
+   <pattern id="schematron-constraint-wegaLetters-physDesc-empty-physDesc-74">
+      <rule context="tei:physDesc">
+                    <assert test="*">
+            <name/> must contain at least one p or accMat element</assert>
+                </rule>
+   </pattern>
+   <pattern id="schematron-constraint-wegaLetters-seg-activeOrPassivePerformance-75">
       <rule context="tei:seg">
                     <report test="./@subtype = ('active', 'passive') and not(./@type = 'performance')">if @subtype contains 'active' or 'passive' @type has to be 'performance'</report>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaLetters-seg-AddresseeOrSenderCorrespondence-75">
+   <pattern id="schematron-constraint-wegaLetters-seg-AddresseeOrSenderCorrespondence-76">
       <rule context="tei:seg">
                     <report test="./@subtype = ('sender', 'addressee') and not(./@type = 'correspondence')">if @subtype contains 'sender' or 'addressee' @type has to be 'correspondence'</report>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaLetters-att.witnessed-att-wit-76">
+   <pattern id="schematron-constraint-wegaLetters-att.witnessed-att-wit-77">
                     <rule context="tei:*[@wit]">
                         <let name="wit" value="@wit"/>
                         <assert test="preceding::tei:witness[@xml:id = substring($wit, 2)]">The @wit-attribute must point at some witness element</assert>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wegaLetters-listWit-only-one-witness-77">
+   <pattern id="schematron-constraint-wegaLetters-listWit-only-one-witness-78">
       <rule context="tei:listWit">
                     <report test="count(tei:witness) le 1">There should always be more than one witness within a listWit element.</report>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaLetters-styleguide-document-node-content-78">
+   <pattern id="schematron-constraint-wegaLetters-styleguide-document-node-content-79">
                 <rule context="document-node()">
                     <report test="count(processing-instruction()) ne 2">WeGA styleguide error: there should exactly be two processing instructions before the root element</report>
                     <report test="comment()">WeGA styleguide error: there should be no comments outside the root element</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaLetters-whitespaceOnlyContent-79">
+   <pattern id="schematron-constraint-wegaLetters-whitespaceOnlyContent-80">
                 <rule context="tei:surname | tei:forename | tei:persName | tei:author[not(@sameAs)] | tei:occupation | tei:settlement | tei:country | tei:region | tei:rs | tei:workName | tei:characterName | tei:hi[not(.//tei:gap)] | tei:head | tei:note[not(@type=('thematicCom'))] | tei:placeName | tei:title | tei:seg | tei:item[not(@* or *)]">
                     <report test="normalize-space(.) = ''">
             <name/> has whitespace only content</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaLetters-elementStartsWithWhitespace-80">
+   <pattern id="schematron-constraint-wegaLetters-elementStartsWithWhitespace-81">
                 <rule context="tei:surname | tei:forename | tei:persName[not(@type)] | tei:author | tei:occupation | tei:settlement | tei:country | tei:region | tei:rs | tei:workName | tei:characterName | tei:hi | tei:placeName[not(parent::tei:address or parent::tei:birth or parent::tei:death)]">
                     <report test="matches(.,'^\s') and (node()[1] = text()[1])">whitespace at the beginning of element <name/>
          </report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaLetters-untrimmedAttributeValues-81">
+   <pattern id="schematron-constraint-wegaLetters-untrimmedAttributeValues-82">
                 <rule context="*">
                     <report test="some $i in @* satisfies string-length(normalize-unicode(normalize-space(replace($i, ' | | | ', ' ')))) ne string-length($i)">There is some whitespace here at the beginning or end of some attribute value.</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaLetters-wegaTargets-82">
+   <pattern id="schematron-constraint-wegaLetters-wegaTargets-83">
                 <rule context="*[starts-with(@target, 'wega:')]">
                     <assert test="matches(@target, '^wega:A[0-9A-F]{6}(#.+)?(\s+wega:A[0-9A-F]{6}(#.+)?)*$')">"wega"-prefixed URIs must follow the pattern "wega:A002068" (i.e. without any file extension)</assert>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaLetters-emojiCheck-83">
+   <pattern id="schematron-constraint-wegaLetters-emojiCheck-84">
                 <rule context="*[some $i in text() satisfies normalize-space($i) ne '']">
                     <report test="matches(., '[⌚-⌛]|[⏩-⏬]|[⏰]|[⏳]|[◽-◾]|[☔-☕]|[♈-♓]|[♿]|[⚓]|[⚡]|[⚪-⚫]|[⚽-⚾]|[⛄-⛅]|[⛎]|[⛔]|[⛪]|[⛲-⛳]|[⛵]|[⛺]|[⛽]|[✅]|[✊-✋]|[✨]|[❌]|[❎]|[❓-❕]|[❗]|[➕-➗]|[➰]|[➿]|[⬛-⬜]|[⭐]|[⭕]|[🀄]|[🃏]|[🆎]|[🆑-🆚]|[🇦-🇿]|[🈁]|[🈚]|[🈯]|[🈲-🈶]|[🈸-🈺]|[🉐-🉑]|[🌀-🌠]|[🌭-🌯]|[🌰-🌵]|[🌷-🍼]|[🍾-🍿]|[🎀-🎓]|[🎠-🏄]|[🏅]|[🏆-🏊]|[🏏-🏓]|[🏠-🏰]|[🏴]|[🏸-🏿]|[🐀-🐾]|[👀]|[👂-📷]|[📸]|[📹-📼]|[📿]|[🔀-🔽]|[🕋-🕎]|[🕐-🕧]|[🕺]|[🖕-🖖]|[🖤]|[🗻-🗿]|[😀]|[😁-😐]|[😑]|[😒-😔]|[😕]|[😖]|[😗]|[😘]|[😙]|[😚]|[😛]|[😜-😞]|[😟]|[😠-😥]|[😦-😧]|[😨-😫]|[😬]|[😭]|[😮-😯]|[😰-😳]|[😴]|[😵-🙀]|[🙁-🙂]|[🙃-🙄]|[🙅-🙏]|[🚀-🛅]|[🛌]|[🛐]|[🛑-🛒]|[🛕]|[🛫-🛬]|[🛴-🛶]|[🛷-🛸]|[🛹]|[🛺]|[🟠-🟫]|[🤍-🤏]|[🤐-🤘]|[🤙-🤞]|[🤟]|[🤠-🤧]|[🤨-🤯]|[🤰]|[🤱-🤲]|[🤳-🤺]|[🤼-🤾]|[🤿]|[🥀-🥅]|[🥇-🥋]|[🥌]|[🥍-🥏]|[🥐-🥞]|[🥟-🥫]|[🥬-🥰]|[🥱]|[🥳-🥶]|[🥺]|[🥻]|[🥼-🥿]|[🦀-🦄]|[🦅-🦑]|[🦒-🦗]|[🦘-🦢]|[🦥-🦪]|[🦮-🦯]|[🦰-🦹]|[🦺-🦿]|[🧀]|[🧁-🧂]|[🧃-🧊]|[🧍-🧏]|[🧐-🧦]|[🧧-🧿]|[🩰-🩳]|[🩸-🩺]|[🪀-🪂]|[🪐-🪕]')">Text contains characters with Emoji presentation as default.</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaLetters-sourceMustResolve-84">
+   <pattern id="schematron-constraint-wegaLetters-sourceMustResolve-85">
                 <rule context="*[starts-with(@source, '#')]">
                     <let name="source" value="@source"/>
                     <assert test="id(substring($source,2))">Unable to locate the reference provided by the @source attribute.</assert>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaLetters-styleguide-document-node-content-85">
+   <pattern id="schematron-constraint-wegaLetters-styleguide-document-node-content-86">
                 <rule context="document-node()">
                     <report test="count(processing-instruction()) ne 2">WeGA styleguide error: there should exactly be two processing instructions before the root element</report>
                     <report test="comment()">WeGA styleguide error: there should be no comments outside the root element</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaLetters-att.wega.rend-underline-n-86">
+   <pattern id="schematron-constraint-wegaLetters-att.wega.rend-underline-n-87">
                     <rule context="*:hi[@n] | *:rend[@n]">
                         <report test="@rend ne 'underline'">The @n-attribute is only supported in combination with @rend='underline'</report>
                     </rule>
diff --git a/schema/de/wegaLetters.rng b/schema/de/wegaLetters.rng
index 30bb328c..b20c6f58 100644
--- a/schema/de/wegaLetters.rng
+++ b/schema/de/wegaLetters.rng
@@ -5,7 +5,7 @@
          xmlns="http://relaxng.org/ns/structure/1.0"
          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
          ns="http://www.tei-c.org/ns/1.0"><!--
-Schema generated from ODD source 2021-01-13T21:21:05Z. .
+Schema generated from ODD source 2021-02-01T09:51:31Z. .
 TEI Edition: Version 4.1.0. Last updated on
 	19th August 2020, revision b414ba550
 TEI Edition Location: https://www.tei-c.org/Vault/P5/Version 4.1.0/
@@ -6172,12 +6172,27 @@ Empfohlene Werte sind: 1] label; 2] data</a:documentation>
    <define name="physDesc">
       <element name="physDesc">
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(materielle Beschreibung) enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse. [10.7. Physical Description]</a:documentation>
-         <oneOrMore>
-            <choice>
-               <ref name="p"/>
+         <group>
+            <zeroOrMore>
+               <ref name="model.pLike"/>
+            </zeroOrMore>
+            <zeroOrMore>
                <ref name="accMat"/>
-            </choice>
-         </oneOrMore>
+            </zeroOrMore>
+         </group>
+         <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
+                  id="wegaLetters-physDesc-empty-physDesc-constraint-assert-51">
+            <rule context="tei:physDesc">
+               <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
+                           xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
+                           xmlns:s="http://www.ascc.net/xml/schematron"
+                           xmlns:sch="http://purl.oclc.org/dsdl/schematron"
+                           xmlns="http://www.tei-c.org/ns/1.0"
+                           xmlns:rng="http://relaxng.org/ns/structure/1.0"
+                           test="*">
+                  <sch:name/> must contain at least one p or accMat element</sch:assert>
+            </rule>
+         </pattern>
       </element>
    </define>
    <define name="accMat">
diff --git a/schema/de/wegaWritings.isosch b/schema/de/wegaWritings.isosch
index f26eff99..4d829965 100644
--- a/schema/de/wegaWritings.isosch
+++ b/schema/de/wegaWritings.isosch
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <schema xmlns="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
    <title>ISO Schematron rules</title>
-   <!-- This file generated 2021-01-13T21:21:11Z by 'extract-isosch.xsl'. -->
+   <!-- This file generated 2021-02-01T09:51:33Z by 'extract-isosch.xsl'. -->
 
    <!-- ********************* -->
    <!-- namespaces, declared: -->
@@ -491,73 +491,79 @@ relatedItem element must be empty</report>
          <report test="not(parent::tei:msPart) and (local-name(*[1])='idno' or local-name(*[1])='altIdentifier' or normalize-space(.)='')">An msIdentifier must contain either a repository or location.</report>
       </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaWritings-seg-activeOrPassivePerformance-72">
+   <pattern id="schematron-constraint-wegaWritings-physDesc-empty-physDesc-72">
+      <rule context="tei:physDesc">
+                    <assert test="*">
+            <name/> must contain at least one p or accMat element</assert>
+                </rule>
+   </pattern>
+   <pattern id="schematron-constraint-wegaWritings-seg-activeOrPassivePerformance-73">
       <rule context="tei:seg">
                     <report test="./@subtype = ('active', 'passive') and not(./@type = 'performance')">if @subtype contains 'active' or 'passive' @type has to be 'performance'</report>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaWritings-seg-AddresseeOrSenderCorrespondence-73">
+   <pattern id="schematron-constraint-wegaWritings-seg-AddresseeOrSenderCorrespondence-74">
       <rule context="tei:seg">
                     <report test="./@subtype = ('sender', 'addressee') and not(./@type = 'correspondence')">if @subtype contains 'sender' or 'addressee' @type has to be 'correspondence'</report>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaWritings-att.witnessed-att-wit-74">
+   <pattern id="schematron-constraint-wegaWritings-att.witnessed-att-wit-75">
                     <rule context="tei:*[@wit]">
                         <let name="wit" value="@wit"/>
                         <assert test="preceding::tei:witness[@xml:id = substring($wit, 2)]">The @wit-attribute must point at some witness element</assert>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wegaWritings-listWit-only-one-witness-75">
+   <pattern id="schematron-constraint-wegaWritings-listWit-only-one-witness-76">
       <rule context="tei:listWit">
                     <report test="count(tei:witness) le 1">There should always be more than one witness within a listWit element.</report>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wegaWritings-whitespaceOnlyContent-76">
+   <pattern id="schematron-constraint-wegaWritings-whitespaceOnlyContent-77">
                 <rule context="tei:surname | tei:forename | tei:persName | tei:author[not(@sameAs)] | tei:occupation | tei:settlement | tei:country | tei:region | tei:rs | tei:workName | tei:characterName | tei:hi[not(.//tei:gap)] | tei:head | tei:note[not(@type=('thematicCom'))] | tei:placeName | tei:title | tei:seg | tei:item[not(@* or *)]">
                     <report test="normalize-space(.) = ''">
             <name/> has whitespace only content</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaWritings-elementStartsWithWhitespace-77">
+   <pattern id="schematron-constraint-wegaWritings-elementStartsWithWhitespace-78">
                 <rule context="tei:surname | tei:forename | tei:persName[not(@type)] | tei:author | tei:occupation | tei:settlement | tei:country | tei:region | tei:rs | tei:workName | tei:characterName | tei:hi | tei:placeName[not(parent::tei:address or parent::tei:birth or parent::tei:death)]">
                     <report test="matches(.,'^\s') and (node()[1] = text()[1])">whitespace at the beginning of element <name/>
          </report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaWritings-untrimmedAttributeValues-78">
+   <pattern id="schematron-constraint-wegaWritings-untrimmedAttributeValues-79">
                 <rule context="*">
                     <report test="some $i in @* satisfies string-length(normalize-unicode(normalize-space(replace($i, ' | | | ', ' ')))) ne string-length($i)">There is some whitespace here at the beginning or end of some attribute value.</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaWritings-wegaTargets-79">
+   <pattern id="schematron-constraint-wegaWritings-wegaTargets-80">
                 <rule context="*[starts-with(@target, 'wega:')]">
                     <assert test="matches(@target, '^wega:A[0-9A-F]{6}(#.+)?(\s+wega:A[0-9A-F]{6}(#.+)?)*$')">"wega"-prefixed URIs must follow the pattern "wega:A002068" (i.e. without any file extension)</assert>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaWritings-emojiCheck-80">
+   <pattern id="schematron-constraint-wegaWritings-emojiCheck-81">
                 <rule context="*[some $i in text() satisfies normalize-space($i) ne '']">
                     <report test="matches(., '[⌚-⌛]|[⏩-⏬]|[⏰]|[⏳]|[◽-◾]|[☔-☕]|[♈-♓]|[♿]|[⚓]|[⚡]|[⚪-⚫]|[⚽-⚾]|[⛄-⛅]|[⛎]|[⛔]|[⛪]|[⛲-⛳]|[⛵]|[⛺]|[⛽]|[✅]|[✊-✋]|[✨]|[❌]|[❎]|[❓-❕]|[❗]|[➕-➗]|[➰]|[➿]|[⬛-⬜]|[⭐]|[⭕]|[🀄]|[🃏]|[🆎]|[🆑-🆚]|[🇦-🇿]|[🈁]|[🈚]|[🈯]|[🈲-🈶]|[🈸-🈺]|[🉐-🉑]|[🌀-🌠]|[🌭-🌯]|[🌰-🌵]|[🌷-🍼]|[🍾-🍿]|[🎀-🎓]|[🎠-🏄]|[🏅]|[🏆-🏊]|[🏏-🏓]|[🏠-🏰]|[🏴]|[🏸-🏿]|[🐀-🐾]|[👀]|[👂-📷]|[📸]|[📹-📼]|[📿]|[🔀-🔽]|[🕋-🕎]|[🕐-🕧]|[🕺]|[🖕-🖖]|[🖤]|[🗻-🗿]|[😀]|[😁-😐]|[😑]|[😒-😔]|[😕]|[😖]|[😗]|[😘]|[😙]|[😚]|[😛]|[😜-😞]|[😟]|[😠-😥]|[😦-😧]|[😨-😫]|[😬]|[😭]|[😮-😯]|[😰-😳]|[😴]|[😵-🙀]|[🙁-🙂]|[🙃-🙄]|[🙅-🙏]|[🚀-🛅]|[🛌]|[🛐]|[🛑-🛒]|[🛕]|[🛫-🛬]|[🛴-🛶]|[🛷-🛸]|[🛹]|[🛺]|[🟠-🟫]|[🤍-🤏]|[🤐-🤘]|[🤙-🤞]|[🤟]|[🤠-🤧]|[🤨-🤯]|[🤰]|[🤱-🤲]|[🤳-🤺]|[🤼-🤾]|[🤿]|[🥀-🥅]|[🥇-🥋]|[🥌]|[🥍-🥏]|[🥐-🥞]|[🥟-🥫]|[🥬-🥰]|[🥱]|[🥳-🥶]|[🥺]|[🥻]|[🥼-🥿]|[🦀-🦄]|[🦅-🦑]|[🦒-🦗]|[🦘-🦢]|[🦥-🦪]|[🦮-🦯]|[🦰-🦹]|[🦺-🦿]|[🧀]|[🧁-🧂]|[🧃-🧊]|[🧍-🧏]|[🧐-🧦]|[🧧-🧿]|[🩰-🩳]|[🩸-🩺]|[🪀-🪂]|[🪐-🪕]')">Text contains characters with Emoji presentation as default.</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaWritings-sourceMustResolve-81">
+   <pattern id="schematron-constraint-wegaWritings-sourceMustResolve-82">
                 <rule context="*[starts-with(@source, '#')]">
                     <let name="source" value="@source"/>
                     <assert test="id(substring($source,2))">Unable to locate the reference provided by the @source attribute.</assert>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaWritings-styleguide-document-node-content-82">
+   <pattern id="schematron-constraint-wegaWritings-styleguide-document-node-content-83">
                 <rule context="document-node()">
                     <report test="count(processing-instruction()) ne 2">WeGA styleguide error: there should exactly be two processing instructions before the root element</report>
                     <report test="comment()">WeGA styleguide error: there should be no comments outside the root element</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaWritings-styleguide-document-node-content-83">
+   <pattern id="schematron-constraint-wegaWritings-styleguide-document-node-content-84">
                 <rule context="document-node()">
                     <report test="count(processing-instruction()) ne 2">WeGA styleguide error: there should exactly be two processing instructions before the root element</report>
                     <report test="comment()">WeGA styleguide error: there should be no comments outside the root element</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wegaWritings-att.wega.rend-underline-n-84">
+   <pattern id="schematron-constraint-wegaWritings-att.wega.rend-underline-n-85">
                     <rule context="*:hi[@n] | *:rend[@n]">
                         <report test="@rend ne 'underline'">The @n-attribute is only supported in combination with @rend='underline'</report>
                     </rule>
diff --git a/schema/de/wegaWritings.rng b/schema/de/wegaWritings.rng
index 16c227fb..31bcc381 100644
--- a/schema/de/wegaWritings.rng
+++ b/schema/de/wegaWritings.rng
@@ -5,7 +5,7 @@
          xmlns="http://relaxng.org/ns/structure/1.0"
          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
          ns="http://www.tei-c.org/ns/1.0"><!--
-Schema generated from ODD source 2021-01-13T21:21:10Z. .
+Schema generated from ODD source 2021-02-01T09:51:33Z. .
 TEI Edition: Version 4.1.0. Last updated on
 	19th August 2020, revision b414ba550
 TEI Edition Location: https://www.tei-c.org/Vault/P5/Version 4.1.0/
@@ -5627,11 +5627,24 @@ Empfohlene Werte sind: 1] label; 2] data</a:documentation>
    <define name="physDesc">
       <element name="physDesc">
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(materielle Beschreibung) enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse. [10.7. Physical Description]</a:documentation>
-         <oneOrMore>
-            <choice>
-               <ref name="p"/>
-            </choice>
-         </oneOrMore>
+         <group>
+            <zeroOrMore>
+               <ref name="model.pLike"/>
+            </zeroOrMore>
+         </group>
+         <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
+                  id="wegaWritings-physDesc-empty-physDesc-constraint-assert-51">
+            <rule context="tei:physDesc">
+               <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
+                           xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
+                           xmlns:s="http://www.ascc.net/xml/schematron"
+                           xmlns:sch="http://purl.oclc.org/dsdl/schematron"
+                           xmlns="http://www.tei-c.org/ns/1.0"
+                           xmlns:rng="http://relaxng.org/ns/structure/1.0"
+                           test="*">
+                  <sch:name/> must contain at least one p or accMat element</sch:assert>
+            </rule>
+         </pattern>
       </element>
    </define>
    <define name="history">
diff --git a/schema/de/wega_all.isosch b/schema/de/wega_all.isosch
index e4d86630..1b3bc304 100644
--- a/schema/de/wega_all.isosch
+++ b/schema/de/wega_all.isosch
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <schema xmlns="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
    <title>ISO Schematron rules</title>
-   <!-- This file generated 2021-01-13T21:21:10Z by 'extract-isosch.xsl'. -->
+   <!-- This file generated 2021-02-01T09:53:21Z by 'extract-isosch.xsl'. -->
 
    <!-- ********************* -->
    <!-- namespaces, declared: -->
@@ -452,33 +452,39 @@ On <name/>, either the @marks attribute should be used, or a paragraph of descri
          <report test="not(parent::tei:msPart) and (local-name(*[1])='idno' or local-name(*[1])='altIdentifier' or normalize-space(.)='')">An msIdentifier must contain either a repository or location.</report>
       </rule>
    </pattern>
-   <pattern id="schematron-constraint-wega_all-orgName-parent-org-63">
+   <pattern id="schematron-constraint-wega_all-physDesc-empty-physDesc-63">
+      <rule context="tei:physDesc">
+                    <assert test="*">
+            <name/> must contain at least one p or accMat element</assert>
+                </rule>
+   </pattern>
+   <pattern id="schematron-constraint-wega_all-orgName-parent-org-64">
                     <rule context="tei:orgName[parent::tei:org]">
                         <report test="@key or not(@type)">It is required to give the type ('alt' or 'reg') of the name while @key is forbiden here.</report>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wega_all-orgName-parent-org-reg-64">
+   <pattern id="schematron-constraint-wega_all-orgName-parent-org-reg-65">
                     <rule context="tei:orgName[parent::tei:org and not(preceding::tei:orgName)]">
                         <assert test="@type='reg'">There must exactly be one name with @type='reg'.</assert>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wega_all-orgName-parent-org-reg-65">
+   <pattern id="schematron-constraint-wega_all-orgName-parent-org-reg-66">
                     <rule context="tei:orgName[parent::tei:org and preceding::tei:orgName]">
                         <report test="@type='reg'">Only the first name can be of @type='reg'. Following names are supposed to be alternative names, @type='alt'.</report>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wega_all-orgName-parent-not-org-66">
+   <pattern id="schematron-constraint-wega_all-orgName-parent-not-org-67">
                     <rule context="tei:orgName[not(parent::tei:org)]">
                         <report test="@type">No @type attribute allowed here.</report>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wega_all-att.witnessed-att-wit-67">
+   <pattern id="schematron-constraint-wega_all-att.witnessed-att-wit-68">
                     <rule context="tei:*[@wit]">
                         <let name="wit" value="@wit"/>
                         <assert test="preceding::tei:witness[@xml:id = substring($wit, 2)]">The @wit-attribute must point at some witness element</assert>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wega_all-listWit-only-one-witness-68">
+   <pattern id="schematron-constraint-wega_all-listWit-only-one-witness-69">
       <rule context="tei:listWit">
                     <report test="count(tei:witness) le 1">There should always be more than one witness within a listWit element.</report>
                 </rule>
@@ -487,95 +493,95 @@ On <name/>, either the @marks attribute should be used, or a paragraph of descri
       
     
       
-    <pattern id="schematron-constraint-wega_all-div-abstractModel-structure-l-71">
+    <pattern id="schematron-constraint-wega_all-div-abstractModel-structure-l-72">
       <rule context="tei:div">
          <report test="ancestor::tei:l">
         Abstract model violation: Lines may not contain higher-level structural elements such as div.
       </report>
       </rule>
    </pattern>
-   <pattern id="schematron-constraint-wega_all-div-abstractModel-structure-p-72">
+   <pattern id="schematron-constraint-wega_all-div-abstractModel-structure-p-73">
       <rule context="tei:div">
          <report test="ancestor::tei:p or ancestor::tei:ab and not(ancestor::tei:floatingText)">
         Abstract model violation: p and ab may not contain higher-level structural elements such as div.
       </report>
       </rule>
    </pattern>
-   <pattern id="schematron-constraint-wega_all-facsimile-graphicOrSameAs-73">
+   <pattern id="schematron-constraint-wega_all-facsimile-graphicOrSameAs-74">
       <rule context="tei:facsimile">
                     <assert test="@sameAs or tei:graphic">A facsimile element must have (at least) a nested graphic element or a @sameAs attribute</assert>
                 </rule>
    </pattern>
-   <pattern id="schematron-constraint-wega_all-facsimile-sourceNwitness-74">
+   <pattern id="schematron-constraint-wega_all-facsimile-sourceNwitness-75">
                     <rule context="tei:facsimile[preceding::tei:witness or preceding::tei:msFrag or preceding-sibling::tei:facsimile or following-sibling::tei:facsimile]">
                         <let name="source" value="@source"/>
                         <assert test="@source and preceding::tei:sourceDesc//tei:*[concat('#',@xml:id) = $source]">A facsimile element must have a @source attribute pointing at the respective element in the sourceDesc</assert>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wega_all-facsimile-sourcePattern-75">
+   <pattern id="schematron-constraint-wega_all-facsimile-sourcePattern-76">
                     <rule context="tei:facsimile[@source]">
                         <let name="source" value="@source"/>
                         <assert test="matches(@source, '^https?|#')">The source attribute must be a local reference (starting with '#') or a pointer to an online resource (starting with http)</assert>
                     </rule>
                 </pattern>
-   <pattern id="schematron-constraint-wega_all-addSpan-spanTo-76">
+   <pattern id="schematron-constraint-wega_all-addSpan-spanTo-77">
       <rule context="tei:addSpan">
          <assert test="@spanTo">The @spanTo attribute of <name/> is required.</assert>
       </rule>
    </pattern>
-   <pattern id="schematron-constraint-wega_all-addSpan-spanTo-spanTo-7-78">
+   <pattern id="schematron-constraint-wega_all-addSpan-spanTo-spanTo-7-79">
                             <rule context="tei:*[@spanTo]">
                                 <assert test="id(substring(@spanTo,2)) and following::*[@xml:id=substring(current()/@spanTo,2)]">
                                     The element indicated by @spanTo (<value-of select="@spanTo"/>) must follow the current element <name/>
                                 </assert>
                             </rule>
                         </pattern>
-   <pattern id="schematron-constraint-wega_all-subst-substContents1-79">
+   <pattern id="schematron-constraint-wega_all-subst-substContents1-80">
       <rule context="tei:subst">
          <assert test="child::tei:add and (child::tei:del or child::tei:surplus)">
             <name/> must have at least one child add and at least one child del or surplus</assert>
       </rule>
    </pattern>
-   <pattern id="schematron-constraint-wega_all-styleguide-document-node-content-80">
+   <pattern id="schematron-constraint-wega_all-styleguide-document-node-content-81">
                 <rule context="document-node()">
                     <report test="count(processing-instruction()) ne 2">WeGA styleguide error: there should exactly be two processing instructions before the root element</report>
                     <report test="comment()">WeGA styleguide error: there should be no comments outside the root element</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wega_all-whitespaceOnlyContent-81">
+   <pattern id="schematron-constraint-wega_all-whitespaceOnlyContent-82">
                 <rule context="tei:surname | tei:forename | tei:persName | tei:author[not(@sameAs)] | tei:occupation | tei:settlement | tei:country | tei:region | tei:rs | tei:workName | tei:characterName | tei:hi[not(.//tei:gap)] | tei:head | tei:note[not(@type=('thematicCom'))] | tei:placeName | tei:title | tei:seg | tei:item[not(@* or *)]">
                     <report test="normalize-space(.) = ''">
             <name/> has whitespace only content</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wega_all-elementStartsWithWhitespace-82">
+   <pattern id="schematron-constraint-wega_all-elementStartsWithWhitespace-83">
                 <rule context="tei:surname | tei:forename | tei:persName[not(@type)] | tei:author | tei:occupation | tei:settlement | tei:country | tei:region | tei:rs | tei:workName | tei:characterName | tei:hi | tei:placeName[not(parent::tei:address or parent::tei:birth or parent::tei:death)]">
                     <report test="matches(.,'^\s') and (node()[1] = text()[1])">whitespace at the beginning of element <name/>
          </report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wega_all-untrimmedAttributeValues-83">
+   <pattern id="schematron-constraint-wega_all-untrimmedAttributeValues-84">
                 <rule context="*">
                     <report test="some $i in @* satisfies string-length(normalize-unicode(normalize-space(replace($i, ' | | | ', ' ')))) ne string-length($i)">There is some whitespace here at the beginning or end of some attribute value.</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wega_all-wegaTargets-84">
+   <pattern id="schematron-constraint-wega_all-wegaTargets-85">
                 <rule context="*[starts-with(@target, 'wega:')]">
                     <assert test="matches(@target, '^wega:A[0-9A-F]{6}(#.+)?(\s+wega:A[0-9A-F]{6}(#.+)?)*$')">"wega"-prefixed URIs must follow the pattern "wega:A002068" (i.e. without any file extension)</assert>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wega_all-emojiCheck-85">
+   <pattern id="schematron-constraint-wega_all-emojiCheck-86">
                 <rule context="*[some $i in text() satisfies normalize-space($i) ne '']">
                     <report test="matches(., '[⌚-⌛]|[⏩-⏬]|[⏰]|[⏳]|[◽-◾]|[☔-☕]|[♈-♓]|[♿]|[⚓]|[⚡]|[⚪-⚫]|[⚽-⚾]|[⛄-⛅]|[⛎]|[⛔]|[⛪]|[⛲-⛳]|[⛵]|[⛺]|[⛽]|[✅]|[✊-✋]|[✨]|[❌]|[❎]|[❓-❕]|[❗]|[➕-➗]|[➰]|[➿]|[⬛-⬜]|[⭐]|[⭕]|[🀄]|[🃏]|[🆎]|[🆑-🆚]|[🇦-🇿]|[🈁]|[🈚]|[🈯]|[🈲-🈶]|[🈸-🈺]|[🉐-🉑]|[🌀-🌠]|[🌭-🌯]|[🌰-🌵]|[🌷-🍼]|[🍾-🍿]|[🎀-🎓]|[🎠-🏄]|[🏅]|[🏆-🏊]|[🏏-🏓]|[🏠-🏰]|[🏴]|[🏸-🏿]|[🐀-🐾]|[👀]|[👂-📷]|[📸]|[📹-📼]|[📿]|[🔀-🔽]|[🕋-🕎]|[🕐-🕧]|[🕺]|[🖕-🖖]|[🖤]|[🗻-🗿]|[😀]|[😁-😐]|[😑]|[😒-😔]|[😕]|[😖]|[😗]|[😘]|[😙]|[😚]|[😛]|[😜-😞]|[😟]|[😠-😥]|[😦-😧]|[😨-😫]|[😬]|[😭]|[😮-😯]|[😰-😳]|[😴]|[😵-🙀]|[🙁-🙂]|[🙃-🙄]|[🙅-🙏]|[🚀-🛅]|[🛌]|[🛐]|[🛑-🛒]|[🛕]|[🛫-🛬]|[🛴-🛶]|[🛷-🛸]|[🛹]|[🛺]|[🟠-🟫]|[🤍-🤏]|[🤐-🤘]|[🤙-🤞]|[🤟]|[🤠-🤧]|[🤨-🤯]|[🤰]|[🤱-🤲]|[🤳-🤺]|[🤼-🤾]|[🤿]|[🥀-🥅]|[🥇-🥋]|[🥌]|[🥍-🥏]|[🥐-🥞]|[🥟-🥫]|[🥬-🥰]|[🥱]|[🥳-🥶]|[🥺]|[🥻]|[🥼-🥿]|[🦀-🦄]|[🦅-🦑]|[🦒-🦗]|[🦘-🦢]|[🦥-🦪]|[🦮-🦯]|[🦰-🦹]|[🦺-🦿]|[🧀]|[🧁-🧂]|[🧃-🧊]|[🧍-🧏]|[🧐-🧦]|[🧧-🧿]|[🩰-🩳]|[🩸-🩺]|[🪀-🪂]|[🪐-🪕]')">Text contains characters with Emoji presentation as default.</report>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wega_all-sourceMustResolve-86">
+   <pattern id="schematron-constraint-wega_all-sourceMustResolve-87">
                 <rule context="*[starts-with(@source, '#')]">
                     <let name="source" value="@source"/>
                     <assert test="id(substring($source,2))">Unable to locate the reference provided by the @source attribute.</assert>
                 </rule>
             </pattern>
-   <pattern id="schematron-constraint-wega_all-att.wega.rend-underline-n-87">
+   <pattern id="schematron-constraint-wega_all-att.wega.rend-underline-n-88">
                     <rule context="*:hi[@n] | *:rend[@n]">
                         <report test="@rend ne 'underline'">The @n-attribute is only supported in combination with @rend='underline'</report>
                     </rule>
diff --git a/schema/de/wega_all.rng b/schema/de/wega_all.rng
index 608551f0..dfc6909e 100644
--- a/schema/de/wega_all.rng
+++ b/schema/de/wega_all.rng
@@ -5,7 +5,7 @@
          xmlns="http://relaxng.org/ns/structure/1.0"
          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
          ns="http://www.tei-c.org/ns/1.0"><!--
-Schema generated from ODD source 2021-01-13T21:21:10Z. .
+Schema generated from ODD source 2021-02-01T09:53:20Z. .
 TEI Edition: Version 4.1.0. Last updated on
 	19th August 2020, revision b414ba550
 TEI Edition Location: https://www.tei-c.org/Vault/P5/Version 4.1.0/
@@ -6092,12 +6092,27 @@ Empfohlene Werte sind: 1] sent; 2] received; 3] transmitted; 4] redirected; 5] f
    <define name="physDesc">
       <element name="physDesc">
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(materielle Beschreibung) enthält eine komplette materielle Beschreibung eines Manuskripts oder Teile eines Manuskripts, gegebenenfalls unterteilt mit mehr spezifischen Elementen aus der model.physDescPart Klasse. [10.7. Physical Description]</a:documentation>
-         <oneOrMore>
-            <choice>
-               <ref name="p"/>
+         <group>
+            <zeroOrMore>
+               <ref name="model.pLike"/>
+            </zeroOrMore>
+            <zeroOrMore>
                <ref name="accMat"/>
-            </choice>
-         </oneOrMore>
+            </zeroOrMore>
+         </group>
+         <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
+                  id="wega_all-physDesc-empty-physDesc-constraint-assert-41">
+            <rule context="tei:physDesc">
+               <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
+                           xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
+                           xmlns:s="http://www.ascc.net/xml/schematron"
+                           xmlns:sch="http://purl.oclc.org/dsdl/schematron"
+                           xmlns="http://www.tei-c.org/ns/1.0"
+                           xmlns:rng="http://relaxng.org/ns/structure/1.0"
+                           test="*">
+                  <sch:name/> must contain at least one p or accMat element</sch:assert>
+            </rule>
+         </pattern>
       </element>
    </define>
    <define name="accMat">
@@ -7760,7 +7775,7 @@ Beispielwerte sind etwa: 1] explicit; 2] implicit</a:documentation>
             </choice>
          </zeroOrMore>
          <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
-                  id="wega_all-facsimile-graphicOrSameAs-constraint-assert-43">
+                  id="wega_all-facsimile-graphicOrSameAs-constraint-assert-44">
             <rule context="tei:facsimile">
                <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
                            xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
@@ -7817,7 +7832,7 @@ Beispielwerte sind etwa: 1] explicit; 2] implicit</a:documentation>
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(hinzugefügter Text) markiert den Beginn einer längeren Sequenz von Text, die von einem Autor, Schreiber, Kommentator oder Korrektor hinzugefügt wurde. [11.3.1.4. Additions and Deletions]</a:documentation>
          <empty/>
          <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
-                  id="wega_all-addSpan-spanTo-constraint-assert-46">
+                  id="wega_all-addSpan-spanTo-constraint-assert-47">
             <rule context="tei:addSpan">
                <sch:assert xmlns:xi="http://www.w3.org/2001/XInclude"
                            xmlns:sch="http://purl.oclc.org/dsdl/schematron"
@@ -7827,7 +7842,7 @@ Beispielwerte sind etwa: 1] explicit; 2] implicit</a:documentation>
             </rule>
          </pattern>
          <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
-                  id="wega_all-addSpan-spanTo_fr-constraint-assert-47">
+                  id="wega_all-addSpan-spanTo_fr-constraint-assert-48">
             <rule context="tei:addSpan">
                <sch:assert xmlns:xi="http://www.w3.org/2001/XInclude"
                            xmlns:sch="http://purl.oclc.org/dsdl/schematron"
@@ -7963,7 +7978,7 @@ Beispielwerte sind etwa: 1] explicit; 2] implicit</a:documentation>
             </oneOrMore>
          </interleave>
          <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
-                  id="wega_all-subst-substContents1-constraint-assert-50">
+                  id="wega_all-subst-substContents1-constraint-assert-51">
             <rule context="tei:subst">
                <assert xmlns:xi="http://www.w3.org/2001/XInclude"
                        xmlns:sch="http://purl.oclc.org/dsdl/schematron"
diff --git a/schema/en/wegaDocuments.rng b/schema/en/wegaDocuments.rng
index 7a5bfc11..d1f3b28d 100644
--- a/schema/en/wegaDocuments.rng
+++ b/schema/en/wegaDocuments.rng
@@ -5,7 +5,7 @@
          xmlns="http://relaxng.org/ns/structure/1.0"
          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
          ns="http://www.tei-c.org/ns/1.0"><!--
-Schema generated from ODD source 2021-01-13T21:38:55Z. .
+Schema generated from ODD source 2021-02-01T09:51:41Z. .
 TEI Edition: Version 4.1.0. Last updated on
 	19th August 2020, revision b414ba550
 TEI Edition Location: https://www.tei-c.org/Vault/P5/Version 4.1.0/
@@ -5612,12 +5612,27 @@ Suggested values include: 1] label; 2] data</a:documentation>
    <define name="physDesc">
       <element name="physDesc">
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(physical description) contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class. [10.7. Physical Description]</a:documentation>
-         <oneOrMore>
-            <choice>
-               <ref name="p"/>
+         <group>
+            <zeroOrMore>
+               <ref name="model.pLike"/>
+            </zeroOrMore>
+            <zeroOrMore>
                <ref name="accMat"/>
-            </choice>
-         </oneOrMore>
+            </zeroOrMore>
+         </group>
+         <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
+                  id="wegaDocuments-physDesc-empty-physDesc-constraint-assert-51">
+            <rule context="tei:physDesc">
+               <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
+                           xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
+                           xmlns:s="http://www.ascc.net/xml/schematron"
+                           xmlns:sch="http://purl.oclc.org/dsdl/schematron"
+                           xmlns="http://www.tei-c.org/ns/1.0"
+                           xmlns:rng="http://relaxng.org/ns/structure/1.0"
+                           test="*">
+                  <sch:name/> must contain at least one p or accMat element</sch:assert>
+            </rule>
+         </pattern>
       </element>
    </define>
    <define name="accMat">
diff --git a/schema/en/wegaLetters.rng b/schema/en/wegaLetters.rng
index c982cc20..2e843bb1 100644
--- a/schema/en/wegaLetters.rng
+++ b/schema/en/wegaLetters.rng
@@ -5,7 +5,7 @@
          xmlns="http://relaxng.org/ns/structure/1.0"
          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
          ns="http://www.tei-c.org/ns/1.0"><!--
-Schema generated from ODD source 2021-01-13T21:38:56Z. .
+Schema generated from ODD source 2021-02-01T09:51:38Z. .
 TEI Edition: Version 4.1.0. Last updated on
 	19th August 2020, revision b414ba550
 TEI Edition Location: https://www.tei-c.org/Vault/P5/Version 4.1.0/
@@ -6172,12 +6172,27 @@ Suggested values include: 1] label; 2] data</a:documentation>
    <define name="physDesc">
       <element name="physDesc">
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(physical description) contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class. [10.7. Physical Description]</a:documentation>
-         <oneOrMore>
-            <choice>
-               <ref name="p"/>
+         <group>
+            <zeroOrMore>
+               <ref name="model.pLike"/>
+            </zeroOrMore>
+            <zeroOrMore>
                <ref name="accMat"/>
-            </choice>
-         </oneOrMore>
+            </zeroOrMore>
+         </group>
+         <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
+                  id="wegaLetters-physDesc-empty-physDesc-constraint-assert-51">
+            <rule context="tei:physDesc">
+               <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
+                           xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
+                           xmlns:s="http://www.ascc.net/xml/schematron"
+                           xmlns:sch="http://purl.oclc.org/dsdl/schematron"
+                           xmlns="http://www.tei-c.org/ns/1.0"
+                           xmlns:rng="http://relaxng.org/ns/structure/1.0"
+                           test="*">
+                  <sch:name/> must contain at least one p or accMat element</sch:assert>
+            </rule>
+         </pattern>
       </element>
    </define>
    <define name="accMat">
diff --git a/schema/en/wegaWritings.rng b/schema/en/wegaWritings.rng
index 99322cf7..cf01f17e 100644
--- a/schema/en/wegaWritings.rng
+++ b/schema/en/wegaWritings.rng
@@ -5,7 +5,7 @@
          xmlns="http://relaxng.org/ns/structure/1.0"
          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
          ns="http://www.tei-c.org/ns/1.0"><!--
-Schema generated from ODD source 2021-01-13T21:39:02Z. .
+Schema generated from ODD source 2021-02-01T09:51:40Z. .
 TEI Edition: Version 4.1.0. Last updated on
 	19th August 2020, revision b414ba550
 TEI Edition Location: https://www.tei-c.org/Vault/P5/Version 4.1.0/
@@ -5627,11 +5627,24 @@ Suggested values include: 1] label; 2] data</a:documentation>
    <define name="physDesc">
       <element name="physDesc">
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(physical description) contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class. [10.7. Physical Description]</a:documentation>
-         <oneOrMore>
-            <choice>
-               <ref name="p"/>
-            </choice>
-         </oneOrMore>
+         <group>
+            <zeroOrMore>
+               <ref name="model.pLike"/>
+            </zeroOrMore>
+         </group>
+         <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
+                  id="wegaWritings-physDesc-empty-physDesc-constraint-assert-51">
+            <rule context="tei:physDesc">
+               <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
+                           xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
+                           xmlns:s="http://www.ascc.net/xml/schematron"
+                           xmlns:sch="http://purl.oclc.org/dsdl/schematron"
+                           xmlns="http://www.tei-c.org/ns/1.0"
+                           xmlns:rng="http://relaxng.org/ns/structure/1.0"
+                           test="*">
+                  <sch:name/> must contain at least one p or accMat element</sch:assert>
+            </rule>
+         </pattern>
       </element>
    </define>
    <define name="history">
diff --git a/schema/en/wega_all.rng b/schema/en/wega_all.rng
index 68ca46ed..83f8080f 100644
--- a/schema/en/wega_all.rng
+++ b/schema/en/wega_all.rng
@@ -5,7 +5,7 @@
          xmlns="http://relaxng.org/ns/structure/1.0"
          datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
          ns="http://www.tei-c.org/ns/1.0"><!--
-Schema generated from ODD source 2021-01-13T21:39:01Z. .
+Schema generated from ODD source 2021-02-01T09:53:31Z. .
 TEI Edition: Version 4.1.0. Last updated on
 	19th August 2020, revision b414ba550
 TEI Edition Location: https://www.tei-c.org/Vault/P5/Version 4.1.0/
@@ -6092,12 +6092,27 @@ Suggested values include: 1] sent; 2] received; 3] transmitted; 4] redirected; 5
    <define name="physDesc">
       <element name="physDesc">
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(physical description) contains a full physical description of a manuscript or manuscript part, optionally subdivided using more specialized elements from the model.physDescPart class. [10.7. Physical Description]</a:documentation>
-         <oneOrMore>
-            <choice>
-               <ref name="p"/>
+         <group>
+            <zeroOrMore>
+               <ref name="model.pLike"/>
+            </zeroOrMore>
+            <zeroOrMore>
                <ref name="accMat"/>
-            </choice>
-         </oneOrMore>
+            </zeroOrMore>
+         </group>
+         <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
+                  id="wega_all-physDesc-empty-physDesc-constraint-assert-41">
+            <rule context="tei:physDesc">
+               <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
+                           xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
+                           xmlns:s="http://www.ascc.net/xml/schematron"
+                           xmlns:sch="http://purl.oclc.org/dsdl/schematron"
+                           xmlns="http://www.tei-c.org/ns/1.0"
+                           xmlns:rng="http://relaxng.org/ns/structure/1.0"
+                           test="*">
+                  <sch:name/> must contain at least one p or accMat element</sch:assert>
+            </rule>
+         </pattern>
       </element>
    </define>
    <define name="accMat">
@@ -7760,7 +7775,7 @@ Sample values include: 1] explicit; 2] implicit</a:documentation>
             </choice>
          </zeroOrMore>
          <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
-                  id="wega_all-facsimile-graphicOrSameAs-constraint-assert-43">
+                  id="wega_all-facsimile-graphicOrSameAs-constraint-assert-44">
             <rule context="tei:facsimile">
                <sch:assert xmlns:mei="http://www.music-encoding.org/ns/mei"
                            xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
@@ -7817,7 +7832,7 @@ Sample values include: 1] explicit; 2] implicit</a:documentation>
          <a:documentation xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">(added span of text) marks the beginning of a longer sequence of text added by an author, scribe, annotator or corrector. [11.3.1.4. Additions and Deletions]</a:documentation>
          <empty/>
          <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
-                  id="wega_all-addSpan-spanTo-constraint-assert-46">
+                  id="wega_all-addSpan-spanTo-constraint-assert-47">
             <rule context="tei:addSpan">
                <sch:assert xmlns:xi="http://www.w3.org/2001/XInclude"
                            xmlns:sch="http://purl.oclc.org/dsdl/schematron"
@@ -7827,7 +7842,7 @@ Sample values include: 1] explicit; 2] implicit</a:documentation>
             </rule>
          </pattern>
          <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
-                  id="wega_all-addSpan-spanTo_fr-constraint-assert-47">
+                  id="wega_all-addSpan-spanTo_fr-constraint-assert-48">
             <rule context="tei:addSpan">
                <sch:assert xmlns:xi="http://www.w3.org/2001/XInclude"
                            xmlns:sch="http://purl.oclc.org/dsdl/schematron"
@@ -7963,7 +7978,7 @@ Sample values include: 1] explicit; 2] implicit</a:documentation>
             </oneOrMore>
          </interleave>
          <pattern xmlns="http://purl.oclc.org/dsdl/schematron"
-                  id="wega_all-subst-substContents1-constraint-assert-50">
+                  id="wega_all-subst-substContents1-constraint-assert-51">
             <rule context="tei:subst">
                <assert xmlns:xi="http://www.w3.org/2001/XInclude"
                        xmlns:sch="http://purl.oclc.org/dsdl/schematron"
diff --git a/src/Specs/common-specs.odd.xml b/src/Specs/common-specs.odd.xml
index 3a4715b6..f0f840fc 100644
--- a/src/Specs/common-specs.odd.xml
+++ b/src/Specs/common-specs.odd.xml
@@ -3657,13 +3657,18 @@
             <classes mode="change">
                 <memberOf key="att.global" mode="delete"/>
             </classes>
+            <constraintSpec scheme="schematron" ident="empty-physDesc">
+                <constraint>
+                    <sch:assert test="*"><sch:name/> must contain at least one p or accMat element</sch:assert>
+                </constraint>
+            </constraintSpec>
             <content>
-                <rng:oneOrMore>
-                    <rng:choice>
-                        <rng:ref name="p"/>
-                        <rng:ref name="accMat"/>
-                    </rng:choice>
-                </rng:oneOrMore>
+                <sequence>
+                    <classRef key="model.pLike" minOccurs="0"
+                        maxOccurs="unbounded"/>
+                    <elementRef key="accMat" minOccurs="0"
+                        maxOccurs="unbounded"/>
+                </sequence>
             </content>
         </elementSpec>