I think I understand what you're describing as a "link map" to be a
"tag cloud" where each tag is a "frequent" or "strong" term.
We did something like this as an experiment (without Lucene):
http://www.cognocys.com/prospector/news.html
If you're talking about something similar, then I think you can use
Lucene's TFVs only to get at the frequency data in the context of the
Documents (not the results). I'm no expert, but I say this because
I've only ever seen TermFrequencyVectors being discussed in the
context of an IndexReader, not in the context of Hits or TopDocs.
http://lucene.apache.org/java/2_4_0/api/core/org/apache/lucene/index/
class-use/TermFreqVector.html
The other thing, though, is that TF may not be sufficient to
determine what to use for each tag/link. For example, given a set of
Results, R, would you like to use:
1. the top N most frequent terms for each Document in R?
2. the top M most frequent terms that are common to all/many
Documents in R?
3. the top O most frequent terms that are common in results built
using the highlighter?
...
To a certain extent, this is a clustering problem:-- given some set
of Documents, R, which just happen to be the results of some search,
represent R using a tag cloud/link map of terms that best represent R.
Have you looked at carrot2? I haven't seen the tag cloud
visualization there, but you may find some ideas for clustering/
document-set representation there:
http://project.carrot2.org/
Good luck!
-h
On 16-Oct-2008, at 3:21 PM, Darren Govoni wrote:
I guess a link map (as I understand it) is a collection of
hyperlinks of
words/phrases where the dominant ones are bolder color and larger
font.
Its relatively new schema, some sites are using.
For example, someone searches for a person and a link map would show
them all the most frequent terms in the results they got back. Sort of
like latent relationships.
Does that help?
I thought this could be done using term frequency vectors in
Lucene, but
I've never used TFV's before. And can then be limited to just a set of
results.
HTH,
Darren
On Thu, 2008-10-16 at 14:09 -0400, Glen Newton wrote:
Sorry, could you explain what you mean by a "link map over lucene
results"?
thanks,
-glen
2008/10/16 Darren Govoni <[EMAIL PROTECTED]>:
Hi,
Has anyone created a link map over lucene results or know of a link
describing the process? If not, I would like to build one to
contribute.
Also, I read about term frequencies in the book, but wanted to
know if I
can extract the strongest occurring terms from a given result set or
result?
thank you for any help. I will keep reading/looking.
Darren
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