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Re: Question about NcML "char" vs "byte" types
- Subject: Re: Question about NcML "char" vs "byte" types
- Date: Fri, 07 Aug 2009 10:42:59 -0600
Michael Johnson wrote:
Hi John,
I recently started working at OPeNDAP.org in Narragansett, RI. I am
working on an NcML handler for Hyrax. I had a simple question which
I couldn't find a satisfactory answer to in the NcML schema or online
and Dan Holloway suggested I write you.
For NcML types "char" and "byte", is the distinction that the
specification of the value is numeric in [0, 255] for a byte and a
single C character for char? I would also assume char types can be
specified using the standard C syntax?
As a metaquestion, is there a repository of NcML files I can use as
examples to find answers for questions such as these as I extend my
parser?
Thanks very much for your help!
-Michael
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Michael Johnson <address@hidden>
OPeNDAP, Inc.
Hi Michael:
"char" is a legacy type that mostly is used for ascii. we generally
assume it can be converted to String type, although there are some
issues around multidimensional arrays. In a way, its not really defines
what it is, but the typical case is that its mapped to C char type.
"byte" is 8-bit data, may be signed or unsigned.
Not sure what you mean by " would also assume char types can be
specified using the standard C syntax? "
You might have a look at:
http://www.unidata.ucar.edu/software/netcdf-java/CDM/index.html
Which parts of NcML you will add to Hyrax? I have some test files,
although I dont think they would answer these kinds of questions.