DTD

Document Type Definition - a format specification file that accompanies documents prepared according to SGML (standard generalized markup language), including XML (extensible markup language). It lists the tags or structural labelling for each distinctive section of text, images, or other embedded file object (examples: title, author, etc.) so that the document can be easily shared and worked with in different operating environments.

Source: U.S. Patent and Trademark Office.

Last reviewed October 2023