EHF ESPD 1.2 | Rules | EHF-ESPD-REQ-B09601

Message: Element 'cac:ExternalReference' MUST be provided.
Context: /espd-req:ESPDRequest/cac:AdditionalDocumentReference/cac:Attachment
Test: cac:ExternalReference
Usage: / espd-req:ESPDRequest / cac:AdditionalDocumentReference / cac:Attachment