On 2017-03-02, at 09:43, Nims,Alva John (Al) wrote:

> Interjecting some useless information.
> 
> Yes, MVS data set names are case insensitive, e.g. Upper Case, so the "File 
> System to Mount" is Upper case, so the name of the MVS data set containing 
> the USS files is Upper Case, but the name of the USS directory name to mount 
> it to IS case insensitive.  So /u/whatchamacallit is NOT the same as 
> /U/whatchamacallit or /u/Whatchamacallit or /u/WhatChaMaCallIt .....
>  
I suspect you have your terminology backward: UNIX filenames are
*case*sensitive* (the case you use makes a difference).

MVS data set names are also case sensitive, but most user interfaces
conceal this by translating to upper case.  But the most direct
interfaces show the case-sensitivity.  In JCL you can create and
access mixed-case data set names (use apostrophes).  And in Assembler
you can create and access mixed-case data set names (SVC 99; DCB)
and mixed-case member names (STOW; BLDL; FIND).

I think it's a disservice either of the HL interfaces to prohibit
access to part of the namespace or of DfSMS to alllow manipulation
of "invalid" names.

-- gil

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