I reset the XML Schema settings and then immediately changed it back to use 1.1, Saxon EE, and allow multiple schema imports, and now it works. The difference from what I had before is only in the Xerces validation features section--which it supposedly isn't using. Maybe the content completion is us...

Years ago, the editor supplied content completion based on the type selected via an xs:alternative. It stopped doing so when I upgraded from 15/16 to 21/23. E.g. given this schema: <?xml version="1.1" encoding="UTF-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema&q...