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Re: Slight change

• To: imgcif-l@bnl.gov
• Subject: Re: Slight change
• From: yaya@bernstein-plus-sons.com (Herbert J. Bernstein)
• Date: Thu, 27 Nov 1997 09:15:10 -0500

Andy,
  I have no objection to the proposal that identifiers start at the at the
very start of a "line", but to avoid implementation errors, I would suggest
making it clear that a "line" begins with the first printable ascii
character (9H or 20H and above) explicitly not including CR, LF, FF, ^D,
^Z, etc., otherwise somebody on a system with a peculiar choice of line
termination might get confused and miss an identifier.

  -- Herbert

>Hello,
>
>I have put together initial "imgCIF / CBF" web pages, and I hope that
>these will soon be accessible to the world, but this is not yet the
>case. The current version of the draft CBF definition will be available
>from the web.
>
>
>I'd like to make a change to the proposal to make it easier to parse a
>CBF i.e.
>
>
>   All CBF identifiers start at the very start of a "line".
>
>   (The file identifier is at the very start of the file (as before),
>   and all other identifiers follow immediately after a carriage return
>   line-feed pairs.)
>
>
>In particular the paragraph:
>
>    The "start of binary identifier" must be separated from all other
>    identifiers by white space. Usually the "line separator" will
>    immediately precede the "start of binary identifier", but blank
>    spaces are also allowed.
>
>Will be changed to:
>
>    A "line separator" immediately precedes the "start of binary
>    identifier", but blank spaces may be added prior to the preceding
>    "line separator" if desired (e.g. to force word or block alignment).
>
>Unless there are protests the second version will appear in the web
>page document.
>
>Regards,
>
>       Andy

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