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Status of DDL/mmCIF

Peter Keller (bsspak@bath.ac.uk)
Thu, 18 May 1995 13:39:59 +0100 (BST) 

Hello everyone,

I'm not sure exactly who is on this list, but I am sure that someone 
could make some comment.

I am working on developing CIF I/O libraries for the CCP4 software, and I
am just about to make a start on the DDL representation. The versions
which I have are DDL v 2.0.15 and mmCIF v 1995-02-13 .  I know that these
are strictly speaking pre-release, and I was wondering what the likely
time of the public announcement is, and if there are any good reasons why
I should not base my development on these versions of the language. 

I notice that other proposals which are appearing are based 
on the old formalism (i.e. _atom_site_attached_hydrogens rather than 
_atom_site.attached_hydrogens), and I think that the sooner the new 
version is released the better. I should think that the Montreal workshop 
is an important point, by which this ought to be clarified, if at all 
possible. BTW, my position on this is that I prefer the new formalism, 
but there are more basic problems with the published STAR syntax which 
ought to be sorted out at some point.

Many thanks for any help,
Peter Keller.

P.S. A couple of typo's in mmCIF v 1995-02-13:

13733c13733
<                                  'K2HgI4
---
>                                  'K2HgI4'
21793c21793
<      'nanometres'             'nanometres  (meters * 10^( -9))
---
>      'nanometres'             'nanometres  (meters * 10^( -9))'

========================================================================
Peter Keller.            \ 
Dept. of Biology and      \ "Not even the greatest nonsense is beyond
    Biochemistry,          \  the reach of human invention."
University of Bath,         \ 
Bath, BA2 7AY, UK.           \          --- Ryszard Kapuscinski
------------------------------\-----------------------------------------
Tel. (+44/0)1225 826826 x 4302 | Email: P.A.Keller@bath.ac.uk (Internet)
Fax. (+44/0)1225 826449        |   P.A.Keller%bath.ac.uk@UKACRL (BITNET)
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