cbc:DocumentHash
Digest of the document, must be a SHA-256 value
- Namespace
 cbcurn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2- Data type
 - Text
 - Rules
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Identifier/Error message Flag PEPPOL-T005-R017 
DocumentHash MUST resemble a SHA-256 hash value (32 byte HexString)fatal