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## XML DTD The purpose of a DTD is to define the structure of an XML document. It uses a series of legal elements to define the document structure: ]> If you want to learn DTD, please look for the DTD tutorial on our ( * * * ## XML Schema W3C supports an XML-based alternative to DTD called XML Schema: If you want to learn XML Schema, please look for the Schema tutorial on our ( * * * ## A General XML Validator To help you check the syntax of XML files, we have created an XML validator, so you can perform syntax checks on any XML file. See the next chapter. AI is thinking...