How you define DTD in XML?

[binarynpixel]

Hi friends,
How you define DTD in XML? please let me help to know that.
Thanks.

[markons]

The best information on this topic can be found at W3Schools site (http://www.w3schools.com/xml/xml_dtd.asp). In addition to the standard way of defining the DTD, there is an alternative method - called XML Schema.

At W3Schools site there is also the validator to validate xml code.