> 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:
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.
"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 Everitt V 703.371.6909 Email Paul.Everitt@cminds.com
Connecting Minds, Inc. F 703.371.1201 WWW http://www.cminds.com/