An xpath expression to reference an cac:Attachment where questions can be asked or refer a file within the ASiC-e.

Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
cbc:XPathType
Rules
Identifier/Error message Flag
PEPPOL-T009-R030
Only references to an attachment are allowed.
fatal