name::katkat bibliography
query:: 
select * 
from katkat.katkat 
where gavo_hasword('variable', source) 
	and minEpoch<1900
description::
To search for title (or other) words in :taptable:`katkat.katkat`'s source
field or in some other sort of bibliographic query, use the ``gavo_hasword``
locally defined function.  This basically works a bit like you'd expect from
search engines: case-insensitive, and oblivious to any context.  ..