Defining prefix mappings for a dataset

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Would it make sense to document a method for defining a set of prefix mappings 
for a dataset?

The particular use case would be in conjunction with SPARQL endpoint 
descriptions: If I want to use a voiD file to connect to a dataset via its 
SPARQL endpoint, then it would be really helpful if the dataset publisher could 
provide me with a default set of prefixes that I could use when writing queries 
against the dataset.

The VANN vocabulary would be an obvious starting point:
http://vocab.org/vann/

This is perhaps related to Issue 45.

Original issue reported on code.google.com by [email protected] on 9 Jun 2010 at 11:32