On May 7, 2009, at 3:07 PM, Loren Lenzen wrote:

> 1)  The daylight spec for SMARTS queries implies that the dot is  
> used as an AND.  However, the SQT is either just taking the first  
> fragment or is using the dot as an OR (I can't tell yet).  ([CH3]Br). 
> ([OH,O-,$([OX2]([#6])[#6])][CH]1([CH]=[CH][CH]5([CH]4(N([CH3])[CH2] 
> [CH2]C25(c3c(O[CH]12)c(O[CH3])[cH][cH]c3[CH2]4))))) returns every  
> listing that contains    BrC.     in its SMILES.

I don't remember exactly, but I think the dot is related to component  
level grouping which is not supported by the CDK SMARTS parser

> 2)  What is the most efficient way to multithread the SQT?  Does a  
> new instance of the SQT have to be created for each thread?

Hmm, good question. I know that some others are looking at multi- 
threading issues across the API. I'm not much of an expert in Java  
multithreading, but I'd venture that the SQT is not multi-threaded,  
mainly due to the underlying UIT code not being thread safe. Thus it's  
probably safest ot have multiple instances of the SQT (which is not  
very efficient)

> 3)  It appears that the SMILES parser doesn't recognize the heavier  
> metals (e.g. Eu).  How much of the periodic table is left out?  Is  
> there a way to capture these atoms without them returning a  
> CDKexception.

Hmm, the time is coming for a JJTree parser ...

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Rajarshi Guha  <rg...@indiana.edu>
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