[chimera-dev] atom spec. in BNF

[Eric Pettersen]

On Nov 5, 2008, at 2:03 PM, David A. C. Beck wrote:

> Does anyone have BNF notation for the atom specification 'language'  
> used
> by Chimera?

I don't think so.  What's the use case here?  If you're in the context  
of Chimera, you should be able to use Chimera's own atom-spec parsing  
facilities, e.g. chimera.specifier.evalSpec().  Outside of Chimera,  
I'm aware of a pretty extensive but not totally complete parser in  
perl:  Chemistry::MidasPattern - Select atoms in macromolecules -  
search.cpan.org

--Eric

                         Eric Pettersen
                         UCSF Computer Graphics Lab
                         http://www.cgl.ucsf.edu

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