Datastore Category vs. String: what is the difference?

Posted by Jaroslav Záruba on Stack Overflow See other posts from Stack Overflow or by Jaroslav Záruba
Published on 2010-06-14T12:19:32Z Indexed on 2010/06/14 12:22 UTC
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google-app-engine

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types

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google-datastore

Looking at Category it seems that it is basically a String. I fail to see any advantages of using Category over String.
What is the difference, and why would I use Category instead of String?

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