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Re: CIF dictionary register dictionary

Hi Brian,

It may be helpful to add the url for the DDL in addition to
the version.  Otherwise this looks good to me.

Regards,

John

Brian McMahon wrote:

> In considering the inclusion of the CIF dictionary register
> (ftp://ftp.iucr.org/pub/cifdics/cifdic.register)
> on the Volume G CD-ROM, I noticed that there is no formal
> description of the tags used in that file to identify the
> CIF dictionaries. I have therefore constructed a dictionary
> of the data names in that file, which I attach below for your
> information and comment. This dictionary can also be found at
> 
>   loop_
>     _cifdic_dictionary.name
>     _cifdic_dictionary.version
>     _cifdic_dictionary.DDL_compliance
>     _cifdic_dictionary.reserved_prefix
>     _cifdic_dictionary.URL
>     _cifdic_dictionary.description
>   cif_register.dic   .   1.4  .
>       ftp://ftp.iucr.org/pub/cifdics/cif_register.dic
>       'Data items used within the register of published CIF dictionaries'
>   cif_register.dic   1.0   1.4  .
>       ftp://ftp.iucr.org/pub/cifdics/cif_register_1.0.dic
>       'Data items used within the register of published CIF dictionaries'
> 
> and this information will of course be added to the version of the
> dictionary registered issued upon publication of Volume G.
> 
> Regards
> Brian
> 
> 
> #------------------------------------------------------------------------------
> 
> ##############################################################################
> #                                                                            #
> #                   CIF DICTIONARY REGISTER DEFINITIONS                      #
> #                   -----------------------------------                      #
> #                                                                            #
> # This dictionary contains the names and definitions of data items           #
> # recognised by the International Union of Crystallography for identifying   #
> # and locating public CIF dictionaries in a standard dictionary register.    #
> #                                                                            #
> # Copyright 2005 International Union of Crystallography                      #
> ##############################################################################
> 
> 
> data_on_this_dictionary
>     _dictionary_name            cif_register.dic
>     _dictionary_version         1.0
>     _dictionary_update          2005-03-19
>     _dictionary_history
> ;
>    2005-03-19  First version formalises the data items in the
>                register of CIF dictionaries located at
>                ftp://ftp.iucr.org/pub/cifdics/cifdic.register
>                (Brian McMahon)
> ;
> 
> #######################
> ## CIFDIC_DICTIONARY ##
> #######################
> 
> data_cifdic_dictionary_[]
>     _name                      '_cifdic_dictionary_[]'
>     _category                    category_overview
>     _type                        null
>     loop_ _example
>           _example_detail
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> ;
>     loop_
>       _cifdic_dictionary.name
>       _cifdic_dictionary.version
>       _cifdic_dictionary.DDL_compliance
>       _cifdic_dictionary.reserved_prefix
>       _cifdic_dictionary.URL
>       _cifdic_dictionary.description
>         cif_core.dic    .    1.4   .
>           ftp://ftp.iucr.org/pub/cifdics/cif_core.dic
>           'Core CIF Dictionary'
>         cif_core.dic   1.0   1.4   .
>           ftp://ftp.iucr.org/pub/cifdics/cifdic.C91
>           'Original Core CIF Dictionary'
>         cif_core.dic  2.0.1  1.4   .
>           ftp://ftp.iucr.org/pub/cifdics/cif_core_2.0.1.dic
>           'Core CIF Dictionary'
>         cif_core.dic  2.1    1.4   .
>           ftp://ftp.iucr.org/pub/cifdics/cif_core_2.1.dic
>           'Core CIF Dictionary'
>         cif_core.dic  2.2    1.4   .
>           ftp://ftp.iucr.org/pub/cifdics/cif_core_2.2.dic
>           'Core CIF Dictionary'
>         cif_core.dic  2.3    1.4   .
>           ftp://ftp.iucr.org/pub/cifdics/cif_core_2.3.dic
>           'Core CIF Dictionary'
> ;
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> ;    Example 1 - extract from the IUCr CIF dictionary register identifying
>                  several revisions of the core CIF dictionary.
> ;
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>     _definition
> ;              The single category CIFDIC_DICTIONARY contains all the 
>                attributes required to identify and locate an individual
>                public CIF dictionary file. Although the primary version
>                of this dictionary is maintained as a DDL1 dictionary,
>                the data names have an embedded period character after the
>                category prefix to allow strict isomorphism with a DDL2
>                equivalent.
> ;
> 
> data_cifdic_dictionary.DDL_compliance
>     _name                      '_cifdic_dictionary.DDL_compliance'
>     _category                    cifdic_dictionary
>     _type                        char
>     _list                        yes
>     _definition
> ;              The version string of the CIF dictionary definition language
>                (DDL) used to record data item attributes in the dictionary.
> ;
> 
> data_cifdic_dictionary.description
>     _name                      '_cifdic_dictionary.description'
>     _category                    cifdic_dictionary
>     _type                        char
>     _list                        yes
>     _definition
> ;              A succinct textual description of the dictionary.
> ;
> 
> data_cifdic_dictionary.name
>     _name                      '_cifdic_dictionary.name'
>     _category                    cifdic_dictionary
>     _type                        char
>     _list                        yes
>     _list_mandatory              yes
>     _definition
> ;              The string used as an identifying label within the dictionary
>                file (as data item _dictionary_name for DDL1 dictionaries
>                or _dictionary.title for DDL2 dictionaries).
> ;
> 
> data_cifdic_dictionary.reserved_prefix
>     _name                      '_cifdic_dictionary.reserved_prefix'
>     _category                    cifdic_dictionary
>     _type                        char
>     _list                        yes
>     _definition
> ;              A prefix reserved for use within a dictionary not maintained
>                directly by COMCIFS. The value of this data item must match
>                an entry in the register of reserved prefixes maintained by
>                COMCIFS (http://www.iucr.org/iucr-top/cif/spec/reserved.html).
>                The special CIF value '.' ('inapplicable') is used in the
>                case of COMCIFS-maintained dictionaries.
> ;
> 
> data_cifdic_dictionary.URL
>     _name                      '_cifdic_dictionary.URL'
>     _category                    cifdic_dictionary
>     _type                        char
>     _list                        yes
>     _list_mandatory              yes
>     _definition
> ;              The uniform resource locator (URL) at which the dictionary
>                may be found on the web.
> ;
> 
> data_cifdic_dictionary.version
>     _name                      '_cifdic_dictionary.version'
>     _category                    cifdic_dictionary
>     _type                        char
>     _list                        yes
>     _list_mandatory              yes
>     _definition
> ;              The string used as a version identifier within the dictionary
>                file (as data item _dictionary_version for DDL1 dictionaries
>                or _dictionary.version for DDL2 dictionaries). This may be
>                any legitimate string, but COMCIFS practice recommends a
>                version identifier of the form n.m.l..., where n, m, l, ...
>                are integers referring to progressively less significant
>                revision levels. The special CIF value '.' is used to indicate
>                the current version.
> ;
> 
> #------------------------------------------------------------------------------
> 
> 
> ------------------------------------------------------------------------
> 
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-- 
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   John Westbrook, Ph.D.
   Rutgers, The State University of New Jersey
   Department of Chemistry and Chemical Biology
   610 Taylor Road
   Piscataway, NJ 08854-8087
   e-mail: jwest@rcsb.rutgers.edu
   Ph:  (732) 445-4290  Fax: (732) 445-4320
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