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Roger, I back-tracked here to find your original. I'm deeply immersed in these woods with the work on NIEM (http://www.niem.org). So NIEM provides Naming and Design Rules (NDR) - that provide for consistency around definitions and tag names. The idea is to promote re-use within domains, and across domains for common components. Here's the bottom line - you need some measure of quality. How well and consistently has each domain implemented their vocabulary? First thing to notice - its almost impossible to determine this by hand inspecting schema - you need tools to help you automate this. Example - if the tag name says its a date and it has a xsd:integer type - that's probably a flag you need to check. At the risk of bringing down a firestorm on myself - the CAM toolkit provides a bunch of stuff to assist you making these determinations (and we've been working this for 3 years now - this is what we live day-to-day). Next you need consolidated dictionaries of the terms used. Again harvesting these from a bunch of schema - time consuming by hand. Then you need comparison spreadsheets showing you what is common across those different vocabularies - a "compare to dictionary" tool. OK - keeping this post short - there's a bunch of tools, tutorials and presentations (most recently from the NIEM NTE - National Training Event) - showing you how to accomplish these tasks taking your schema and running them from through the CAM tools. Bon chance - its a journey - but hopefully you can make informed decisions as to the choices and routes possible. DW
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