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Re: [ddlm-group] CIF2 Syntax all wrapped up?

In a data file, empty lists and tables will be very useful, just as
null values are useful.

I would suggest that the rules for comments be uniform in or out of
lists and table -- if a '#' occurs after the completion of a token,
it starts a comment that continues to the end of the line, as in
   [1,#one
    2, #two
    3 #three
    ,4 #four
    ]

I thought we put aside the line-joining issues for future discussion
to get this document out.

I see no reason to require quoting of a key if the result is unambiguous.

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

                  +1-631-244-3035
                  [email protected]
=====================================================

On Mon, 21 Dec 2009, Joe Krahn wrote:

> There have been no answers for:
> 1) Are empty tables or lists are valid?
> 2) What are the rules for comments within lists and tables?
> 3) What exactly does "implied line joining" mean in the TABLE definition?
> 4) Why require single or double quotes for table index strings, rather
> than just follow the normal quoting rules?
>
> Some of these are more technical details compared to the other issues.
> These came up while I was working on a big CIF2 regular-expression,
> where parsing details have to be considered more carefully.
>
> Thanks,
> Joe Krahn
>
> James Hester wrote:
>>> Dear DDLm-ers,
>>>
>>> Am I correct in assuming that everyone is satisfied with the
>>> square-bracket syntax recently proposed by Nick?  If so, I believe there
>>> is only one significant outstanding issue, that of being allowed to put
>>> whitespace between the key and the full colon, and the full colon and
>>> the value, in a table.  I agree with Joe that no extra syntactic
>>> complexity is introduced by allowing (not mandating) whitespace to
>>> appear in these locations.   If nobody objects, I would like to suggest
>>> that we alter the standard to allow such whitespace.
>>>
>>> James.
>>> --
>>> T +61 (02) 9717 9907
>>> F +61 (02) 9717 3145
>>> M +61 (04) 0249 4148
>>>
>
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>
> [*** Normal Termination ***]
>
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