Parsing text to automatically create tags in Rails

Question

I plan on using the act_as_taggable_on gem for my Post class. However, I would like to extract and create new tags from the content of the message.

For example, if the message heading is "How do I solve this problem with algebra", I would like to create a new algebra tag (but not for other words).

Is there a gem to do this, and if not, how do I do it? (i.e. detect sensible words to create tags)

Thanks.

Answer 1

There are several tools for this.

You can look at http://engtagger.rubyforge.org/

http://martin.ankerl.com/2007/01/09/textanalyzer-automatically-extract-characteristic-words/

or take a look at this http://www.viget.com/extend/tagging-text-automatically/ which uses the yahoo term extraction service.