Re: [ddlm-group] Fwd: Fwd: Searching for a compromise on eliding. .. .

---

From: Herbert J. Bernstein <yaya@bernstein-plus-sons.com>
To: Group finalising DDLm and associated dictionaries <ddlm-group@iucr.org>
Sent: Monday, 28 February, 2011 21:13:45
Subject: Re: [ddlm-group] Fwd: Fwd: Searching for a compromise on eliding. . . .

Dear Simon,

  The G example is no more or less likely than an F example.  Whatever
choice of delimiters we make, the primary purpose is to be able to quote
chunk of CIF within such strings.  Once we start using any multi-line
delimiter for this purpose, then that delimiter will need to be well-
handled in quoting chunks of CIF with that delimiter included.  That
is one more reason to prefer P, P-prime, F or GP to F' or G.

  Regards,
    Herbert


At 8:26 PM +0000 2/28/11, SIMON WESTRIP wrote:
>Dear Herbert,
>
>Your G example is highly unlikely to be necessary in practice, which
>is one reason I've started
>to see the merits of alternative delimters that don't share a
>character with other delimiters and that are
>unlikely to form part of a CIF data value.
>
>Cheers
>
>Simon
>
>
>
>From: Herbert J. Bernstein <yaya@bernstein-plus-sons.com>
>To: Group finalising DDLm and associated dictionaries <ddlm-group@iucr.org>
>Sent: Monday, 28 February, 2011 19:34:48
>Subject: Re: [ddlm-group] Fwd: Fwd: Searching for a compromise on
>eliding. . . .
>
>The prudent thing to do is to double every backslash you want taken
>verbatim, whether it is at the end of a line or not.  One nice aspect
>of P and P-prime is that you get in the habit of eliding the quote
>marks as well, as in
>
>"""This is an example of \"\"\"treble quoting\"\"\""""
>
>even though
>
>"""This is an example of \"""treble quoting""\""""
>
>is sufficient.  It keeps your visual clues more local.  I would suggest
>that those considering the merits of P and P-prime versus G and F', consider
>that in GP, the above would appear in F' as
>
>"""This is an example of ""\
>"treble quoting""\
>"\
>"""
>
>and the similar G statement would be
>
>``This is an example of `\
>`G quoting`\
>`\
>``
>
>which seems somewhat less clear than the more Pythonesque P, P-prime and
>F one-liners
>
>
>
>At 12:29 PM -0600 2/28/11, Bollinger, John C wrote:
>>On Monday, February 28, 2011 12:16 PM, I wrote:
>>
>>>F and GP would require backslash doubling when a literal backslash
>>>appears at the end of a line, and also when a literal
>>>double-backslash appears anywhere (in which case both backslashes
>>>would need to be doubled, \\ -> \\\\).
>>
>>Correction: F and GP would require backslash doubling when a literal
>>backslash appears at the end of a line.  In addition, given any
>>sequence of n + 1 literal backslashes (n >= 0), the first n of them
>>must be doubled, but doubling the last is optional unless it appears
>>at the end of the line.
>>
>>John
>>
>>--
>>John C. Bollinger, Ph.D.
>>Department of Structural Biology
>>St. Jude Children's Research Hospital
>>
>>
>>
>>
>>Email Disclaimer:
>><http://www.stjude.org/emaildisclaimer>www.stjude.org/emaildisclaimer
>>
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>--
>=====================================================
>  Herbert J. Bernstein, Professor of Computer Science
>    Dowling College, Kramer Science Center, KSC 121
>        Idle Hour Blvd, Oakdale, NY, 11769
>
>                  +1-631-244-3035
>                  <mailto:yaya@dowling.edu>yaya@dowling.edu
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--
=====================================================
  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
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