We've been successfully using Microsoft's Index Server
which is "free" (part of the NT Option Pack 4, comes
with their "IIS" web server) for indexing/searching on
metadata elements, including DC. It works fine for
HTML documents 'out of the box' after you define
the metadata fields you're interested in searching on
using as 'cached properties' using the Index Server
manager.
But most of our metadata is held in XML files, and we had
to tweak some registry settings to get Index Server to
parse metadata tags in XML documents.
Kent Fitch Ph: +61 2 6276 6711
ITS CSIRO Canberra Australia [log in to unmask]
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