This is an example from the authorities document: <Organization resource="http://bibframe/auth/org/k.g.saur"> <label>K.G. Saur</label> <hasIDLink resource="http://id.loc.gov/authorities/names/nr91037301" /> <hasVIAFLink resource="http://viaf.org/viaf/125770969" /> <hasDNBLink resource="http://d-nb.info/gnd/4020140-5" /> </Organization> First, I doubt if it's sustainable to create a separate property for each authority file one might link to. Second, I question the value of having a property called "link" or "hasXXXLink". After all, it's all links in linked data. The property should carry the semantic value that expresses meaning of the relationship is between the subject and the object. subject: <http://bibframe/auth/org/k.g.saur> property: <has_some_relationship_to> object: <http://id.loc.gov/authorities/names/nr91037301> Basically, since every property is a link between two things, "hasLink" is not a sufficiently defined relationship. That said, I freely admit that coming up with a clear statement of the relationship between different authority files is not easy given differences in cataloging rules worldwide. MADSRDF has "hasCloseExternalAuthority," which seems to be a good way of linking authority data, although in a very library-specific way. That may be more accurate than the over-used OWL:sameAs, which is "different names that refer to the same individual," but it won't be as widely understood. Other options? kc -- Karen Coyle [log in to unmask] http://kcoyle.net ph: 1-510-540-7596 m: 1-510-435-8234 skype: kcoylenet