OffTopic: Newbie problems with Schema

[Jose Luis Zabalza]

Hello everybody.

I know this is a xerces list, so, if this question is a offtopic, I am
sorry. Accept my apologizes in avance.

Question :

It is posible do complex type content dependent of a attribute value?

Next, is a example. TYPE content depend of class attribute values.

The next schema have two error.

First, VINIT element are diferent type on schema and I get one error
form Xerces Schema validator.

After, content TYPE element are "unbounded" to class attribute, so, is
valid write a "bool" class atribute with a enum content.

It would be thankful another list reference more appropiate to this question.

Thanks in avance.


<!-- ==================FILE================================== -->
<?xml version="1.0" encoding="iso-8859-1" ?>
<DATATYPES
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
 xsi:noNamespaceSchemaLocation='datatypes.xsd'>

 <SYMBOLS>
   <TYPE id="first" class="bool">
     <VINIT>true</VINIT>
     <TRUE>this is true</TRUE>
     <FALSE>this is false</FALSE>
   </TYPE>

   <TYPE id="second" class="string">
     <VINIT>this is a string</VINIT>
     <MAXLEN>100</MAXLEN>
   </TYPE>

   <TYPE id="third" class="enum">
     <VINIT>1</VINIT>
     <OPTIONS>
        <OPTION value="1">first option</OPTION>
        <OPTION value="2">second option</OPTION>
        <OPTION value="3">third option</OPTION>
     </OPTIONS>
   </TYPE>


<!-- this is a error but good for schema  -->
   <TYPE id="fourth" class="bool">
     <VINIT>1</VINIT>
     <OPTIONS>
        <OPTION value="1">first option</OPTION>
        <OPTION value="2">second option</OPTION>
        <OPTION value="3">third option</OPTION>
     </OPTIONS>
   </TYPE>
 </SYMBOLS>

<!-- ..... anothers elements ... -->

</DATATYPES>


<!-- ============= SCHEMA ============ -->

<?xml version="1.0" encoding="ISO-8859-1" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";>


 <xsd:group name="groupClassString">
   <xsd:sequence>
     <xsd:element name="VINIT"  type="xsd:string" />
     <xsd:element name="MAXLEN"    type="xsd:unsignedInt" minOccurs="0"/>
   </xsd:sequence>
 </xsd:group>


 <xsd:group name="groupClassBool">
   <xsd:sequence>
     <xsd:element name="VINIT"  type="xsd:boolean" />
     <xsd:element name="TRUE"   type="xsd:string"/>
     <xsd:element name="FALSE"  type="xsd:string"/>
   </xsd:sequence>
 </xsd:group>


 <xsd:group name="groupClassEnum">
   <xsd:sequence>
     <xsd:element name="VINIT"  type="xsd:unsignedInt" />
     <xsd:element name="OPTIONS"  >
        <xsd:complexType>
          <xsd:sequence>
            <xsd:element name="OPTION" maxOccurs="unbounded">
              <xsd:complexType>
                <xsd:simpleContent>
                  <xsd:extension base="xsd:string">
                    <xsd:attribute name="value" type="xsd:unsignedInt" 
use="required"/>
                  </xsd:extension>
                </xsd:simpleContent>
              </xsd:complexType>
            </xsd:element>
          </xsd:sequence>
        </xsd:complexType>
     </xsd:element>
   </xsd:sequence>
 </xsd:group>

 <xsd:complexType name="ClassSymbol">

   <xsd:choice >
     <xsd:group ref="groupClassString"/>
     <xsd:group ref="groupClassBool"/>
     <xsd:group ref="groupClassEnum"/>
   </xsd:choice>


   <xsd:attribute name="id" use="required" type="xsd:string"/>
   <xsd:attribute name="class" use="required">
     <xsd:simpleType>
        <xsd:restriction base="xsd:string">
          <xsd:enumeration value="string"/>
          <xsd:enumeration value="bool"/>
          <xsd:enumeration value="enum"/>
        </xsd:restriction>
     </xsd:simpleType>
   </xsd:attribute>
 </xsd:complexType>



 <xsd:element name="DATATYPES">
   <xsd:complexType>
     <xsd:sequence>
        <xsd:element name="SYMBOLS">
          <xsd:complexType >
            <xsd:sequence>
              <xsd:element name="TYPE" minOccurs="0" maxOccurs="unbounded"
                      type="ClassSymbol" />
            </xsd:sequence>
          </xsd:complexType>
        </xsd:element>
<!-- ....... Others elements ....... -->
     </xsd:sequence>
   </xsd:complexType>
 </xsd:element>   


</xsd:schema>

--
José Luis Zabalza
[EMAIL PROTECTED]
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