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Our annotation nodes are elements in a separate document or documents. These have an href attribute that points to what is being annotated. The HREF uses a restricted XPointer syntax: URL#xpath(LocationPath) Where xpath() is a simplified XPointer scheme that supports just XPath LocationPath expressions. Our annotations are very nearly [and designed that way] simple XLinks. My real issue about context is the selection of documents [linkbases] to use when searching for third-party links. If I have a given document, and can get to its linkbases [by getting some metadata stored with the document], then I can find the annotations that I want. I'm thinking of just standardizing on XLink in general for annotations. Then, I can somewhere declare the roles [and arcroles] that I want to reverse index [possibly collection level metadata]. So then, if I add a document to a collection, and that document contains links with the given roles, I would locate the nodes referred to in the @xlink:href of the element to find the nodes, and reverse index them. If the links fail to execute, then I fail to add it to the collection, and report an error back to the caller. Importing a link element should also trigger indexing on the element and its attributes, in this system, since the identification of a link in a document implies that there is a high likely hood of its attributes being needed [at least in the system I'm working on]. Keith <<attachment: winmail.dat>>
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