Validating a document directly against http://www.tei-c.org/release/xml/tei/custom/schema/relaxng/tei_allPlus.rng, Oxygen produced the following error message:
SystemID: C:\Program Files (x86)\Oxygen XML Editor 10\frameworks\tei\xml\tei\custom\schema\relaxng\tei_allPlus.rng
Programmname: oNVDL
Feherlevel: error
Beschreibung: conflicting ID-types for attribute "id" of element "partialdiff" from namespace "http://www.w3.org/1998/Math/MathML"
Anfang: 10862:191
are you really using oXygen 10? that is very old, and has an old version of the TEI schemas.
do you get the same error with current schema?
Cannot reproduce this error with Oxygen 15.1 so closing the ticket.
Cannot reproduce this error with Oxygen 15.1 so closing.