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Re: [ddlm-group] Case sensitivity

There was discussion about case sensitivity of data names at the COMCIFS meeting in Osaka.  My recollection is that we agreed that names should be case sensitive, and to avoid problems with having two data names that differ only in their cases, all data names should be lower case.  There are legacy problems because in DDL1 the data names are case insensitive, and while most of the names have been written in lower case, upper case letters have been traditionally used for proper names, e.g., _space_group_name_Hall.  There may well be legacy CIFs in which only lower case letters have been used but probably not many.


Joe Krahn wrote:
Is there any interest in making CIF2 case-sensitive, at least data names?

There was some discussion that names may eventually extend into the UTF 
range, even though it would be avoided for the near future. That 
complicates case-insensitive matching, because standard library 
functions are locale dependent. If data names are not strictly limited 
to 7-bit ASCII, it would be good to make names case-sensitive.

Joe Krahn
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