Add fallbacks to Epub 2 case for series and title's sorting key

readium · May 1, 2020 · 776ea1d · 776ea1d
1 parent e9ba515
commit 776ea1d
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/streamer/parser/metadata.md b/streamer/parser/metadata.md
@@ -53,7 +53,7 @@ The primary `title` is defined using the following logic:
 
 Parse it as a [localized string](#localized-strings) to compute a language map.
 
-The sorting key of the publication is carried by the main title’s refine whose `property` is `file-as`.
+The sorting key of the publication is carried by the main title’s refine whose `property` is `file-as`. If there is none, fallback to the EPUB 2.x case.
 
 The subtitle is the value of the `<dc:title>` element whose `title-type` (refine) is `subtitle`. In case there are several, use the one with the lowest `display-seq` (refine).
 Parse it as a [localized string](#localized-strings) to compute a language map.
@@ -271,6 +271,8 @@ The `identifier` string is the value of the refine whose `property` has the valu
 
 The `position` of the publication is the value of the refine whose `property` has the value of `group-position`.
 
+If there is no `series`, try to parse `calibre:series` as in the EPUB 2.x case.
+
 ## Progression Direction
 
 The `readingProgression` of a publication is a key whose value is a string amongst the following: