> I'd also like to construct complex standing queries about "the president
> of the United States" in the news, which returns a conditional result.
> The selection mechanism for a search engine can be distinct from both
> the scoring and highlighting mechanisms. An older document might
> incorrectly highlight the word "Clinton" if he was "govenor Clinton" at
> the time.
Referencing Dan Connolly's excellent summary of Harvest:
http://harvest.cs.colorado.edu/
There is a subsystem called Nebula by Mic Bowman (a member of the Harvest
team) that allows for complex standing queries. I believe they are still
in progress on putting Harvest over Nebula.
Extract from:
http://harvest.cs.colorado.edu/harvest/technical.html
"With Nebula, each object is represented as a set of attribute/value
pairs. There is a separate index (and possibly mechanism) per attribute
tag. Nebula also supports a view notion involving a standing query against
object base. This allows information to be filtered based on query
predicates. It is easy to refine and extend the predicates over time, and
observe changes interactively."
--Paul
Paul Everitt V 703.371.6909 Email Paul.Everitt@cminds.com
Connecting Minds, Inc. F 703.371.1201 WWW http://www.cminds.com/