Add isrn to list of biblioid class attribute values

diff --git a/docbook/xml/dbpoolx.mod b/docbook/xml/dbpoolx.mod
index 30f4636346cae0d3298c7b5819b28ffe6ddc8f8d..809ec588f576d66361b5f00009145eb61092f43c 100644 (file)
--- a/docbook/xml/dbpoolx.mod
+++ b/docbook/xml/dbpoolx.mod
@@ -5444,6 +5444,7 @@ in the text (no (0) value, the default)
                "class  (uri
                          |doi
                          |isbn
+                        |isrn
                          |issn
                          |libraryofcongress
                          |pubnumber