Jonathan Borden released "Defining logical relationships between documents, schemata, URIs, resources and entities".
After a comment from Pat Hayes, who noted:
"The relationship between a URL and the
file it locates is not the same as that between a logical name and what it denotes (for example, the locatee is not determined relative to an interpretation, but is fixed by the operational circumstances.)"
Borden replied that:
"I agree that there currently exists alot of fuzziness in this regard. I am
in the process of trying to clean this up by providing a (hopefully) logical framework. http://www.rddl.org/SchemaAlgebra is a work in progress addressing some of these issues. Statements 10 - 20 address URI related
terms."
The document also defines equivalence between schemas, even schemas written in different languages, and makes explicit the relationships between URIs, XML namespaces, and RDDL.
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