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Real World XML by Steven Holzner

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Understanding Cascades

You can use multiple stylesheets for one XML document in several ways because there are multiple ways of attaching stylesheets. For example, you can use the <?xml-stylesheet?> processing instruction, and you can use the @import directive (for example, this directive will import a stylesheet: @import url(http://www.starpowder.com/ch09_02.css);) in a stylesheet to import another stylesheet. The reader of a document may use browser-specific techniques to use stylesheets, and the reader's software can even supply default stylesheets.

In addition, the author or reader of a document can use another declaration, the !important declaration, to specify that some aspect of a style should not be overridden by inheritance. (For example, ...

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