Attn: James C., Magdelena T., and others intimately familiar with the Processing Model I have merged in changes from 'dev' branch into 'sydb-modelAttrChecks' branch. The only changes are in P5/Source/Specs/model.xml; the only significant change there is the addition of two new <constraintSpec>s. Could you test the Schematron? If you don't want to build it yourself you can find it here: http://paramedic.wwp.neu.edu/~syd/temp/TEI_Council/testPMtests/tei_all.isosc... http://paramedic.wwp.neu.edu/~syd/temp/TEI_Council/testPMtests/ref-model.htm... Thanks. BTW, I know that the tagdoc looks ugly because of long lines. I'm really interested in whether a) the Schematron is complaining about the right stuff, and b) if the error messages are understandable.