Message

An Endpoint Identifier Scheme MUST be from the list of PEPPOL Party Identifiers described in the "PEPPOL Policy for using Identifiers".

Context
ubl:Enquiry/cac:ResponderParty/cbc:EndpointID
Test
matches(normalize-space(./@schemeID),'^(0002|0007|0009|0037|0060|0088|0096|0097|0106|0130|0135|0142|0151|0183|0184|0190|0191|0192|0193|0195|0196|0198|0199|0200|0201|0202|0204|0208|0209|0210|0211|0212|0213|9901|9906|9907|9910|9913|9914|9915|9918|9919|9920|9922|9923|9924|9925|9926|9927|9928|9929|9930|9931|9932|9933|9934|9935|9936|9937|9938|9939|9940|9941|9942|9943|9944|9945|9946|9947|9948|9949|9950|9951|9952|9953|9955|9957)')
Usage
/ t009:Enquiry / cac:ResponderParty / cbc:EndpointID / @schemeID