'Can I use RegExps in DTD schemas?

I want to enforce that an XML element has to contain an ISBN code. Therefore, I need your typical pattern "[0-9]{3}-[0-9]{3}......".

Could that be achieved on a DTD schema? I've read you can't combine DTD with RegExps but I'm not so sure.

Solution 1:^[1]

No, you can't define regex patterns with DTD.

You can enforce regex patterns with XSD schemas.

<xsd:simpleType name="SSN">
    <xsd:restriction base="xsd:token">
        <xsd:pattern value="[0-9]{3}-[0-9]{2}-[0-9]{4}"/>
    </xsd:restriction>
</xsd:simpleType>

Another option is applying some sort of other validation, such as Schematron.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Mads Hansen

'Can I use RegExps in DTD schemas?

Solution 1:[1]

Sources

Related Questions

Solution 1:^[1]