If you are returning a document d as a result to the user query, the snippet is supposed to convince the user
that d is indeed relevant to the query. To do this, it has to (a) show where the text of the query occurs in the document
and (b) what are the distinguishing features of this document. "b" can be satisfied by listing terms in the document with high idf values
(as these are the parts of the document that are its most distinguishing characteristics)
rao
On Sun, Sep 11, 2011 at 6:07 AM, Ganesh Krishnamurti <gkrishn5@asu.edu> wrote:
Dear Prof Rao,
You mentioned on Sep 6th lecture that IDF is also used in displaying the synopsis with the search results. Unfortunately I am not getting this point. It would be nice if you can explain this to me more elaborately.