Do any of the search versions for SharePoint 2010 allow refinement of results based on keywords that appear within documents?
I know that the standard search functionality allows for searching within documents however it is unclear how rich this functionality is.
We would like to be able to rank results based on the number of times a keyword appears in the document (and to also use a thesaurus on these keywords). We would also like to be able to refine results based on these terms.
I believe this would require the creation of managed properties based on document contents, it seems like FAST search server might do this with it's meta-data extration but i'm not sure and I can't seem to find any detail on this beyong the list of 10 reasons to buy FAST search server.
In summary - is the above functionality available in any of the SharePoint 2010 search options?