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Re: [Imgcif-l] CBF Format

Dear Justin,

  Welcome on board the CBF bandwagon.  As others have
told you, you would do best to create full CBF headers,
but starting with a miniCBF and using a variant
on convert_minicbf can be very useful in learning
what you need to do to get there.

  Harry Powell has made the current best suggestion
about what to include in a header.  You will find his
proposal at:

http://www.medsbio.org/meetings/BSR_2007_imgCIF_Workshop/HP_header.html

  Right now, for reading in general, you should
expect to find the detailed size information
in the main header, with an increasing number
of datasets putting the detailed information
in both the main header and the MIME header
because XDS expects it in the MIME header.
As we add full DDLm methods compliance over
the next 2 years, the checking programs
will start to be able to validate each against
the other.

  Have fun.

  Regards,
    Herbert


=====================================================
 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
=====================================================

On Wed, 12 Sep 2007, Justin Anderson wrote:

> Hello everyone,
>
> My name is Justin Anderson with Rayonix (formerly MarUSA).  I have been
> given the task of adding CBF format support to the marccd program.  I
> was hoping you could help me with a few questions that have arisen.  I
> truly appreciate it.
>
> Now for the questions...
>
> 1)  Are miniCBF files meant to be read by imaging programs such as
> marccd or are they expected to be converted to full CBF format first?
>
> 2)  What is the minimum set of fields that is necessary for an official
> miniCBF and CBF file?  In the "Simple Example Header" in section 2 of
> the Draft Format
> (http://www.iucr.org/iucr-top/cif/cbf/cbf_definition.html) it does
> mention at one point that "the above" data items are optional.  Does
> that imply that the items below are required?
>
> 3)  Some items can exist in both the header area and the MIME area.  One
> such example is the image size (e.g. fastest and second-fastest number
> of pixels).  When reading a CBF file, should I expect to get that
> information from the MIME, the CBF header area or would it be found in both?
>
> I appreciate any help you can give me.
>
>
>
> Justin Anderson                    Rayonix, LLC (Formerly Mar USA)
> Software Engineer                  justin@rayonix.com
> 1880 Oak Ave. Ste. 120             Evanston, IL, USA 60201
> 877.627.9729                       847.869.1548
>
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