[Versa] Issue 2

[Uche Ogbuji]

On Fri, 2005-08-12 at 09:25 -0400, Chimezie Ogbuji wrote:
> I think both exist already (a filter function and backwards traversal).
> 
> Do you mean something like:
> 
> ((foo:A <- foo:B - *) - foo:C -> *) <- foo:D - *

I think he wants backwards filter for literals, i.e. something like:

list("U.S.A.", "Nigeria", "England") |<- dc:title -> * 

Which would effectively be "return a list of the country names that are
actually used in the graph".

I agree.  Especially if we end up having some functions that can lead to
systematic generation of a list of literals.


-- 
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
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