Form of UCD-based queries

Let's see how hard it is to agree a form for identifying UCDs in queries in both ADQL/x and ADQL/s form to be taken forward into the ADQL v1.1 spec.

ADQL/x

I don't know the schema, but I would guess we can just stick an attribute on the 'column name' element to identify it as a UCD rather than a column name. The rest of the spec should be okay. Non?

ADQL/s

Would my previous suggestion work? I.e., we use [ucd::UCD-identifier], e.g. [ucd::phot.flux;em.radio;arith.ratio].

Comments, suggestions, fruit buns etc...

Cheers,
Tony.

-- 
Tony Linde
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