@schemeID
- Example value
 0204- Code lists
 - ISO 6523 ICD list
 - Rules
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Identifier/Error message Flag PEPPOL-T005-R008 
A Party Identifier MUST have a scheme identifier attribute.fatal PEPPOL-T005-R009 
A Party Identifier Scheme MUST be from the list of PEPPOL Party Identifiers described in the "PEPPOL Policy for using Identifiers".fatal