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Re: Response to Pflugrath

  • To: Multiple recipients of list <imgcif-l@bnl.gov>
  • Subject: Re: Response to Pflugrath
  • From: Andy Hammersley <hammersl@esrf.fr>
  • Date: Fri, 12 Jan 1996 11:20:24 -0500 (EST)
Hi Jim,

   Try: Acta Cryst: (1991), A47, 655-685 which includes the CIF Dictionary
   (Core Version 1991).
   
   For this and version II, and other CIFS, try WWW:
   
       http://www.iucr.ac.uk/cif/home.html
       
   
   We've just had a joint Neutron / X-ray software workshop ("NOBUGS") so
   Bob Sweet has been here along with John Skinner, and Neutron scatterers from
   Argonne. This has given me a chance to meet Bob. An informal discussion was 
   held on data formats: "imageNCIF" and what was previously "HADES" and is 
   now being called "NEXUS".  Perhaps the two initiatives are sufficiently 
   different to both be valid ?
   
   My summary would be:
   
     NEXUS (based on HDF): Powerful, complicated, heavyweight, with base 
     support by NCSA
       
     "imageNCIF": Simple, limited (whilst of course being potentially 
     extensible), lightweight, but code must be written (or adapted)
     
     I could imagine NEXUS/HDF being a better "transport" mechanism for a 
     small close scientific community with complicated demands on the variety
     of data types that they wanted to store in files.
     
     "imageNCIF" could be better for simpler needs and more appropriate for
     efficient data acquisition.
     
        
   A question which I feel is equal valid for both initiatives, and equally
   unanswered is:
   
   How general is the format trying to be ? e.g. Should it cover an EXAFS 
   spectra with several different counter values per time bin ?
   
   Other people may of course see things a little differently !
   
   Best Regards,
   
                Andy Hammersley

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