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   Re: [xml-dev] Enumerated Lists Derived from Enumerated List simpleType -

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"Arthur Colman" <arthur.colman@verizon.net> writes:

> A quick check of my interpretation of XML Schema functionality.
> I have a simpleType that is an enumerated list of all the possible
> values for an attribute. Let's say that the list is of all the
> continents in the world. This list (CITW) would contain A,B,C,D,E,F,G

I'd like to help, but I can't be sure what you mean -- do you mean
your type is simply an atomice enumerated type with 7 values, or a
list type with up to 7 list items, each a member of such an enumerated
type -- that is, is 'A C G' a possible value?

> I want to create various subset simpleTypes (or restrict the content
> directly at the attribute). Let's say that I want to create subset lists
> for continents that are intersected by the various longitudinal lines.
> This for the Equator would contain A,C,E and for the North Pole (G)
> where the base type would be (CITW) and the subsets would be derived
> from it.

Here's the answer for the first (simpler) case:

<xs:simpleType name="CITW">
 <xs:restriction base="xs:NormalizedString">
  <xs:enumeration value="Africa"/>
  <xs:enumeration value="Antartica"/>
  <xs:enumeration value="Asia"/>
  <xs:enumeration value="Australia"/>
  <xs:enumeration value="Europe"/>
  <xs:enumeration value="North America"/>
  <xs:enumeration value="South America"/>

<xs:simpleType name="SHC">
 <xs:restriction base="CITW">
  <xs:enumeration value="Africa"/>
  <xs:enumeration value="Antarctica"/>
  <xs:enumeration value="Australia"/>
  <xs:enumeration value="South America"/>

Hope this helps,

  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2002, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/
 [mail really from me _always_ has this .sig -- mail without it is forged spam]


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