2. The method of claim 1 : wherein the first UALI comprises a first Unique Annotation Identifier (UAI) that uniquely identifies the first annotation data; wherein (A) comprises receiving a request containing the first UAI; and wherein (C) comprises, in response to the request containing the first UAI, manifesting the first annotation data in connection with a manifestation of the second instance of the first XML document.
2. The method of claim 1 : wherein the first UALI comprises a first Unique Annotation Identifier (UAI) that uniquely identifies the first annotation data; wherein (A) comprises receiving a request containing the first UAI; and wherein (C) comprises, in response to the request containing the first UAI, manifesting the first annotation data in connection with a manifestation of the second instance of the first XML document. 3. The method of claim 2 , wherein the first annotation data comprises first annotation content data representing the first annotation content, first target locating data for locating the second instance of the first target, and first association data representing the first association.