Re: [cml/ccml-discuss] a question regarding units

[peter murray-r. <pm...@ca...>]

At 15:20 26/09/2007, Rajarshi Guha wrote:
>Hi, I have been working on a format for specification of
>pharmacophores and when I define distances I want to also specify
>units. I know that CML allows unit specification, but I'm a little
>confused as to how it does it - does it define it's own schema for
>units?

If you look in the examples there should be some called unit.xml, 
unitType.xml, etc.




>My schema is written in RelaxNG and the units are defined as
>attributes of an element.
>
>However it's not clear to me how one goes about include unit
>information. My approach was below:
>
>      <define name="distanceUnitsDef">
>          <choice>
>              <value>A</value>
>              <value>nm</value>
>              <value>pm</value>
>          </choice>
>      </define>
>
>But if I understand, this merely defines the symbols used for the
>units attribute and doesn't necessarily mean anything outside of this
>schema

Correct. I assume you want units of length. At present I don't think 
our dictionaries, including the units, are on SVN and I will check with Jim.

P.



>Is there an official schema for measurement units? How would one
>incorporate that into a RelaxNG schema?
>
>Thanks,
>
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>Rajarshi Guha  <rg...@in...>
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Peter Murray-Rust
Unilever Centre for Molecular Sciences Informatics
University of Cambridge,
Lensfield Road,  Cambridge CB2 1EW, UK
+44-1223-763069