keywords in LightRoom

Doug Franklin jehosephat at
Tue Oct 6 18:39:18 EDT 2009

Graydon wrote:

> Yeah, but I got taught data structures by a graph theorist, and we did
> graphs, acyclic graphs, directed graphs, and then acyclic directed
> graphs, so my brain thinks the acyclic is a special case of directed,
> rather than the other way around.

That taxonomy is not acyclic. :-)

[Directed and acyclic are orthogonal characteristics when applied to 
graphs.  A graph may be either, neither, or both.]

DougF (KG4LMZ)

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