Roma seems to be adding namespaces to <exemplum>s, e.g.
<val>20 × 30 mm</val>
becomes
<val xmlns:sch="http://purl.oclc.org/dsdl/schematron" xmlns:ns182="http://www.tei-c.org/ns/1.0">20 × 30 mm</val>
I've tried this with my own ODD and some of the templates, with the same result.
relocating from https://github.com/TEIC/TEI/issues/838
Roma seems to be adding namespaces to
<exemplum>
s, e.g.<val>20 × 30 mm</val>
becomes<val xmlns:sch="http://purl.oclc.org/dsdl/schematron" xmlns:ns182="http://www.tei-c.org/ns/1.0">20 × 30 mm</val>
I've tried this with my own ODD and some of the templates, with the same result.