Message

[PEPPOL-T006-R014] The document type code for the document reference (the received tender) MUST be '310' or '13'.

Context
ubl:TenderReceipt/cac:TenderDocumentReference/cbc:DocumentTypeCode
Test
matches(normalize-space(.),'^310|13')
Usage
/ t006:TenderReceipt / cac:TenderDocumentReference / cbc:DocumentTypeCode