DTD element default value

[lonelydragon]

hello, can you give me a hand?
i am now writing a DTD file. andi need to define the legal value for an element. but i have no idea to do that? hope you can give me some help. thank you in advance.

 

[JontyMC]

DTD's not my strong point, but I don't think you can do this with them. You can, however, do it with XML Schema's.

 

[lonelydragon]

ok. thank you for your advice. i will try Schema. hope it work. thank you.

 

[JontyMC]

For XML Schema tutorial, check out:

http://www.w3schools.com/schema/default.asp

To do a restriction on element values you would do the following:

<xs:element name="car">

<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="Audi"/>
<xs:enumeration value="Golf"/>
<xs:enumeration value="BMW"/>
</xs:restriction>
</xs:simpleType>

</xs:element>

or

<xs:element name="car" type="carType"/>

<xs:simpleType name="carType">
<xs:restriction base="xs:string">
<xs:enumeration value="Audi"/>
<xs:enumeration value="Golf"/>
<xs:enumeration value="BMW"/>
</xs:restriction>
</xs:simpleType>