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Gah! I hate it when people post intelligently but do so anonymously. It suggests to me that they're not going to hang around the monastery. I certainly hope you do.
Actually, last night I was doing quite a bit of thinking (and reading) about this problem and using a database seemed to be one of two solutions. Actually, a multi-value database like UniData would be awesome (it would handle lists very easily), but I don't know of any open-source versions.
The other thought was to use directed graphs with adjacency lists. I think that would be workable and I could use DB_File to handle persistance. However, I am much more familiar with database theory so I think that would be better (and probably allow more people to contribute). The nice thing about databases is that I think they would solve the Unification problem very easily, if I can come up an easy scheme to create them on the fly (I'm seeing more deviation from Prolog already).
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In reply to Re: Re: Choosing a data structure for AI applications