You cant use textNode as a child of datatype. Change them tp datRef key teidata.text Sent from my Huawei Mobile -------- Original Message -------- Subject: purifying tei_xinclude.odd exemplar From: James Cummings To: TEI Council ,Lou Burnard CC: Hi all, Because we should just purify these, but mostly because I wanted to include XInclude into an ODD I'm writing, I tried to purify the elementSpecs in https://github.com/TEIC/TEI/blob/dev/P5/Exemplars/tei_xinclude.odd#L73 My attempt is at https://gist.github.com/jamescummings/b01882b2e33f612ec7ea361c6060698a But keeps giving me a schematron error "datatype content must be in the namespace '' ". I remember having a conversation with Lou about datatypes and namespaces but can someone remind me why I'm getting this error? -James -- Dr James Cummings, James.Cummings@it.ox.ac.uk Academic IT Services, University of Oxford