RE: [xml-dev] schema content model question

["Michael Fitzgerald" <mike@wyeast.net>]

In XML Schema, you can add attributes to an element with simple content
using an anonymous complex type as a child of the element declaration.
Something like will work:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";>

<xs:element name="foo">
 <xs:complexType>
  <xs:simpleContent>
   <xs:restriction base="xs:string">
    <xs:enumeration value="fizz"/>
    <xs:enumeration value="fuzz"/>
   </xs:restriction>
  </xs:simpleContent>
   <xs:attribute name="bar" type="Bar"/>
 </xs:complexType>
</xs:element>

<xs:simpleType name="Bar">
 <xs:restriction base="xs:string">
  <xs:enumeration value="glorp"/>
  <xs:enumeration value="glop"/>
 </xs:restriction>
</xs:simpleType>

</xs:schema>

The syntax for RELAX NG (12 lines) is somewhat simpler than the XML Schema
syntax (18 lines). For example:

<element name="foo" xmlns="http://relaxng.org/ns/structure/1.0";>
 <attribute name="bar">
  <choice>
   <value>glorp</value>
   <value>glop</value>
  </choice>
 </attribute>
 <choice>
  <value>fizz</value>
  <value>fuzz</value>
 </choice>
</element>

Here is a valid instance for both schemas, tested with MSV:

<?xml version="1.0"?>

<foo bar="glorp">fuzz</foo>


Mike

-----Original Message-----
From: Morgan V. Cundiff [mailto:mcundiff@loc.gov]
Sent: Wednesday, March 06, 2002 8:18 AM
To: xml-dev@lists.xml.org
Subject: [xml-dev] schema content model question



I have been attempting to create an XML Schema content model for an
element like the following:

- the element should contain text only, no subeleemnts (simpleContent?)
- the permissable values of the element should be restricted to a list of
enumerated string values
- the element should also have attributes with values which are also
restricted to list of enumerated string values.

Is this possible? I have made several attempts which I will send if it is
useful for discussion but I thought perhaps someone can just provide the
answer.

thanks,
Morgan Cundiff
Library of Congress


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