Home >Online Product Documentation >Table of Contents >Defining Data Elements in a Sample DTD
This topic is part of a sequence that starts with Creating a Sample DTD.
In your DTD, suppose you want a book element to be optional. Further, if a book element is present, it must always have exactly one title element and it can have any number of author elements. The title and author elements contain only raw data.
When you are done, the Stylus Studio desktop should resemble the following:
Cart
, which is the top button in the tool bar on the left side of the DTD editor window.
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