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Fernando Cubria wrote:
> Hello:
> ¿Is there a way to tell, in dtd syntax, that a "link" element can contain any
combination of text and "b" elements or just one "img" element?
> I have tried with
> <!ELEMENT link ((#PCDATA | b)* | img) >
> but I get an error.
> Thank you.
> Fernando
You can do this using choice. You could do this in XML Schema (xs:choice):
<xs:element name="link">
<xs:complexType mixed="true">
<xs:choice>
<xs:element ref="b"/>
<xs:element ref="img"/>
</xs:choice>
</xs:complexType>
</xs:element>
<xs:element name="b" type="xs:string"/>
<xs:element name="img"/>
Or this in RELAX NG (choice):
<element name="link">
<choice>
<ref name="b"/>
<ref name="img"/>
</choice>
</element>
<define name="b">
<mixed>
<element name="b"><text/></element>
</mixed>
</define>
<define name="img">
<element name="img"><empty/></element>
</define>
Or in RELAX NG's compact syntax (| is choice):
element link { b | img }
b = mixed {element b { text }}
img = element img { empty }
Mike
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