Registry Query Language

I have set out some ideas on the query language that might be used for registry and metadata queries. This subject concerns both registry and voql groups, but to avoid duplicated email messages, I have written a wiki document:

http://wiki.astrogrid.org/bin/view/Astrogrid/RegistryQL

Comments and flames to this (registry) list please.

-- 
Clive Page
Dept of Physics & Astronomy,
University of Leicester,
Leicester, LE1 7RH,  U.K.