I tested creating an app that uses other ODDs than the default ones (teipublisher.odd and tei_simplePrint.odd). It works fine unless for the "plain" view (via click on "single Page" in the tools menu). This situation produces an error message: ``` err:XPTY0004 text()( ) is not a sub-type of element() [at line 52, column 55, source: /db/apps/matrix2/modules/lib/transform.xql] In function: local:postprocess(node()*, element()?, xs:string) [52:13:/db/apps/matrix2/modules/lib/transform.xql] ``` The fix is to have an elementSpec for the TEI element in one of the app's ODDs: ``` <elementSpec ident="TEI" mode="change"> <model behaviour="document"/> </elementSpec> ```