diff --git a/HTAN.model.jsonld b/HTAN.model.jsonld
index 357344bf..eb787449 100644
--- a/HTAN.model.jsonld
+++ b/HTAN.model.jsonld
@@ -1291,9 +1291,6 @@
                 },
                 {
                     "@id": "bts:Pkc"
-                },
-                {
-                    "@id": "bts:XeniumExperiment"
                 }
             ],
             "sms:displayName": "File Format",
@@ -2839,23 +2836,6 @@
             "sms:required": "sms:false",
             "sms:validationRules": []
         },
-        {
-            "@id": "bts:XeniumExperiment",
-            "@type": "rdfs:Class",
-            "rdfs:comment": "TBD",
-            "rdfs:label": "XeniumExperiment",
-            "rdfs:subClassOf": [
-                {
-                    "@id": "bts:FileFormat"
-                }
-            ],
-            "schema:isPartOf": {
-                "@id": "http://schema.biothings.io"
-            },
-            "sms:displayName": "Xenium Experiment",
-            "sms:required": "sms:false",
-            "sms:validationRules": []
-        },
         {
             "@id": "bts:Checksum",
             "@type": "rdfs:Class",
@@ -43341,7 +43321,7 @@
         {
             "@id": "bts:PanelName",
             "@type": "rdfs:Class",
-            "rdfs:comment": "The human-readable panel name. This could be the Gene Panel name or Protein Panel name",
+            "rdfs:comment": "The human-readable panel name. This could be the Gene Panel name or Protein Panel name. In Xenium, this refers to the string entered as the name in panel specification (e.g. Xenium Human Immuno-Oncology Add-on B Gene Expression). In CosMx, this refers to the panel name as it appears in the CosMx catalog (e.g. CosMx Human Universal Cell Characterization Panel (1000-plex))",
             "rdfs:label": "PanelName",
             "rdfs:subClassOf": [
                 {
@@ -43443,7 +43423,7 @@
         {
             "@id": "bts:DecodedTranscripts",
             "@type": "rdfs:Class",
-            "rdfs:comment": "In Xenium, this is the number of high-quality, decoded-to-gene nuclear transcripts divided by the total segmented nuclear area to get a transcript density",
+            "rdfs:comment": "In Xenium, this is the number of high-quality, decoded-to-gene nuclear transcripts divided by the total segmented nuclear area to get a transcript density (units are reported in 100um^2).",
             "rdfs:label": "DecodedTranscripts",
             "rdfs:subClassOf": [
                 {