Using DTDs in Microsoft .NET

Stylus Studio® includes the ability to access the DTD parsing technology that Microsoft has implemented and distributed over the years. For example, to validate XML documents against DTDs, the following are included:

  • Microsoft MSXML 4.0 DOM Parser
  • Microsoft MSXML 6.0 DOM Parser
  • Microsoft .Net System.Xml Parser

DTD Parsing with .Net

Both the Microsoft MSXML family of DLLs and the Microsoft .Net architecture support DTD parsing and validation. For example, to read a file while enabling DTD usage, the following .Net code fragments might be helpful:

DTD Parsing with Visual Basic

Dim settings As New XmlReaderSettings()
settings.ValidationType = ValidationType.DTD ' turn DTD Validation on
Dim reader As XmlReader = XmlReader.Create("book.xml", settings)

DTD Parsing with C#

XmlReaderSettings settings = new XmlReaderSettings();
settings.ValidationType = ValidationType.DTD; // turn DTD Validation on
XmlReader reader = XmlReader.Create("book.xml", settings);

Where to get the Parsers

If, for some reason, you machine is lacking one or more of these (which is unlikely, since they are usually part of some larger installation package or Microsoft update, but still happens sometimes), here are some pointers to the downloads from Microsoft:

  • If your machine does not include MSXML 4, you can retrieve a copy from Microsoft here.
  • MSXML 6 is available from Microsoft here.
  • The .Net version comes with the .Net distribution package, version 2.0 of which can be downloaded from here.

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