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On 02/11/11 20:20, Mike Grant wrote:
> I'll put that in another email as this is already way too long and I
> suspect it's unworkable ;)
Trying to address wanting different standard_names, shared or different
flag_meanings and shared or different flag data..
Extend the idea in Jonathan's #2 proposal so that the contents of any
variable can be farmed out to others, by allowing a variable to
"#include" another variable and then override its values.
// direct use of flags data
float a(...);
a:ancillary_variables = "flags_data" ;
// same flags data as a, different meaning
float b(...) ;
b:ancillary_variables = "b_flags_container" ;
// same flags data as a, different meaning, different name
float c(...) ;
c:ancillary_variables = "c_flags_container" ;
// different flags data, same meaning
float d(...) ;
d:ancillary_variables = "d_flags_container" ;
// contains actual flags data
int flags_data(...) ;
// contains actual flags data
flags_data:#include_variable = "flags_data_meanings";
flags:standard_name = "flags generic name";
// meanings for flags
int flags_data_meanings() ;
flags:flag_values = "0, 1, 2, 4, 8, ..." ;
flags:flag_meanings = "meaning0 meaning1 ... meaning 4 ....";
// same flags data as a, subset of or different meaning
int b_flags_container;
b_flags_container:#include_variable = "flags_data";
b_flags_container:flag_values = "0, 1, 2";
b_flags_container:flag_meanings = "meaning0 meaning1 meaning2...";
// same flags data as a, different meaning and different name
int c_flags_container;
c_flags_container:#include_variable = "flags_data";
c_flags_container:standard_name = "overridden flags name";
c_flags_container:flag_values = "0, 1, 4, 8";
c_flags_container:flag_meanings = "meaning0 meaning1 meaning3 meaning4";
// different flags data, same meaning as a
int d_flags_data(...);
// contains actual flags data, different to flags_data
d_flags_container:#include_variable = "flags_data_meanings";
d_flags_data:standard_name = "something";
.....
While this is quite powerful and relatively easy to implement, it leads
CF down a scary path of inheritance, confusion, etc and I wouldn't be
surprised if we didn't want to go there ;)
Cheers,
Mike.
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