Digital Signature Origin Part
| Content Type: | application/vnd.openxmlformats-package.digital-signature-origin | 
| Root Namespace: | not applicable | 
| Source Relationship: | http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/origin | 
The Digital Signature Origin part is the starting point for navigating through the signatures in a package.
This part shall have no contents.
A package is permitted to contain zero or one Digital Signature Origin part in a package and it shall the target of a relationship from the package-relationship item for a WordprocessingML, SpreadsheetML, or PresentationML package.
<Relationships xmlns="…"> <Relationship Id="rId1" Type="http://…/origin" Target="../origin.sigs"/> </Relationships>
A Digital Signature Origin part shall be located within the package containing the source relationship (expressed syntactically, the @TargetMode attribute of the <Relationship> element shall be Internal).
A Digital Signature Origin part is permitted to have implicit relationships to the following parts defined by this Standard:
- Digital Signature XML Signature (§15.2.7) 
A Digital Signature Origin part shall not have implicit or explicit relationships to any other part defined by this Standard.