We are in the process of designing a Fedora repository for archival preservation of our digital content and have a question regarding best practices advice for the RELS-EXT datastream.  The Fedora RELS-EXT ontology (http://www.fedora.info/definitions/1/0/fedora-relsext-ontology.rdfs) includes RDF properties for both directions of a relationship (e.g., “isPartOf” and “hasPart”).  Do most installations implement both directions of such a relationship – i.e., the “whole” object has a RELS-EXT datastream with a “hasPart” relationship to each of its “parts” _and_ each “part” object has a RELS-EXT datastream with a “isPartOf” relationship to the corresponding “whole”?  Or do you typically pick one side or the other to represent in RELS-EXT – either the “hasPart” relationship from whole to part _or_ the “isPartOf” relationship from part to whole _but not both_?  Interested in best practices advice, a sense of what the common practice is, etc.
Thanks!
--Jim
 
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Jim Coble
Core Services Technical Lead and Program Coordinator
Information Technology Services
Perkins Library
Box 90196, Duke University
Durham, NC 27708-0196
Email: jim.coble@duke.edu
Voice: 919-660-5974  Fax: 919-668-2578
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