Additional comments on DataTypes for XML Schemas

(Note: this original note was sent to Paul V. Biron, and he suggested that
it should be posted to this list)


Paul,

I have been reading your XML Schema Part 2: DataTypes Draft 05 November 1999

there is a type of data that I can not described... I work for the US Navy
and we need to 
describe radio frequencies... this example shows at least two things that
may need to 
be added to the Schema definition... 

first we have a "delta" description for radio frequencies... so 
one may have a frequency at

501,832.2 hz  so the precision is down to 1/10ths of hertz but the next 
frequency available is at a "delta" of 2Khz so at

503,832.2 hz ... again it is describing discrete ranges rather than
continuous... 

the second thing that can happen is that one may want to be able to 
set things from frequencies A-B,C-D
so one may want to 
concatenate non-contiguous ranges together to make a 
data type...

I did not see in the spec a way to do either one of these...

ed






 <<G. Edward Roberts.vcf>>