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Re: [ddlm-group] A modest addition to the DDLm spec. .

You must, of course, quote all pluses not being used as a
concatenation operator.

=====================================================
  Herbert J. Bernstein, Professor of Computer Science
    Dowling College, Kramer Science Center, KSC 121
         Idle Hour Blvd, Oakdale, NY, 11769

                  +1-631-244-3035
                  yaya@dowling.edu
=====================================================

On Thu, 30 Sep 2010, Bollinger, John C wrote:

> On Thursday, September 30, 2010 10:18 AM, SIMON WESTRIP wrote:
>
>> First thought is how does this work in loops?
>>
>> loop_ _item
>> 'abc' + 'def'
>
> One specific (but synthetic) example I was thinking of was along the same lines:
>
> loop_
> _amino_acid.code
> _amino_acid.optical_rotation_direction
> 'ALA' +
> 'ARG' +
> 'LEU' -
>
>> But I need to check whether + is one of the characters that is not allowed to start a
>> non-delimited string...
>
> It is not.  Those are " ' _ $ [ {
> If the proposal is adopted then adding + to that list would reduce the added complications for parsing.  That would be incompatible with using the optional leading + with numeric values, however.
>
>> Otherwise I see no reason not to explore this.
>
> I see no reason at all not to explore it.  Notwithstanding the above, I have not yet formed an opinion on this question.
>
>
> Regards,
>
> John
> --
> John C. Bollinger, Ph.D.
> Department of Structural Biology
> St. Jude Children's Research Hospital
>
>
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