Assuming acceptance of PaceReplaceTypeWithAccept, introduce an 'edit-content' link relation that references the edit-uri for resources referenced by content[@src='...']
Assuming acceptance of PaceReplaceTypeWithAccept, this provides the ability to link to content resources.
Add to section 10
10.# The 'edit-content' Link Relation This specification adds the value "edit-content" to the Registry of Link Relations. The value of "edit-content" signifies that the IRI in the value of the href attribute is the IRI used to update and delete the resource referenced by the 'src' attribute of the atom:content element.