Rajarshi, thanks for your help on the SMARTSQueryTool. 

I tried to look back at the history of the SQT and UIT, but am unclear on 
the algorithm used.  Is it Ullman, VF2, Hanser, or a mishmash?  The 
description of UIT in the Javadoc says Hanser, but based on recent blog 
postings, it seems as though SQT might use Ullman, and I was under the 
impression that SQT is a wrapper of UIT.

Does SQT.matches(IAtomContainer atomContainer) return after a single match 
or does it find all matches first?  If the latter, would there be any 
problems extending the method to a type like 
SQT.matches(IAtomContainer atomContainer, boolean forceInitialization, 
boolean singleMatch) where the method would immediately return True on 
finding a single match if set to True?  Obviously, one would have to be 
careful to not use countMatches, etc.


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