Question About Meta Tag - Abstract

Bram,

I've been dealing with SEO'ing forum software since the first premium product for vBulletin had been in beta testing.

I have never heard of : <meta name="abstract">, or any positives that it gives out. From my perspective it adds in a duplicate description which may become penalized by the search engines.

What do you know about this meta? Are there any positives known concerning its usage? How about negatives?

I am a little worried about using it and may look through the code to delete the majority of meta tags that I know nothing about.

I found it somewhere, i can't remember where but its mostly used for books and magazine pages.
and if you also know that search engine picks up meta tags differently, so not to worry about dupe content.