You have already learned DTD,What's next?

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DTD Summary

This tutorial has explained to you how to describe the structure of XML documents.

You have learned how to use DTD to define the legal elements of an XML document, and how to declare DTD either inside your XML or as an external reference.

You have learned how to declare legal elements, attributes, entities, and CDATA sections for XML documents.

You have also seen how to validate an XML document against a DTD.

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Now that you have learned about DTD, what should you learn next?

The next step should be to learn XML Schema.

XML Schema is used to define the legal elements of an XML document, similar to DTD. We believe that XML Schema will soon replace DTD and be used in most web applications.

XML Schema is an XML-based replacement for DTD.

Unlike DTD, XML Schema supports data types and namespaces.

If you wish to learn more about XML Schema, please visit our《XML Schema Tutorial》。

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