How to include DTD in a XML document

How do I include DTD in a XML document开发者_开发知识库. Please provide me a sample. Thanks

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use the DOCTYPE declaration: <!DOCTYPE root-element SYSTEM "filename">

http://www.w3schools.com/dtd/dtd_intro.asp

http://www.w3schools.com/tags/tag_doctype.asp

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I prefer to use the XML classes in the System.Xml.Linq namespace myself because they're much easier to work with. It's very easy to create a doctype object like this:

using System.Xml.Linq;

// ...

XDocumentType docType = new XDocumentType("myDoctypeName", null, "myown.dtd", null);

You can then build an XML document by creating a root XElement and wrapping the root and doctype in an XDocument like so:

XDocument doc = new XDocument(docType, rootElement);

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If you are talking about programmatically adding it in code on an XmlDocument in C# then you might want to look at the XmlDocument.CreateDocumentType Method.

If not, you might want to expand on what it is you are after exactly.

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e.g. for using global variables across several files

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration SYSTEM "sample.dtd">
<myxml>
<node1>&testval;</node1>
</myxml>

sample.dtd:
<!ENTITY testval "1" >