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The <defs> section permits pseudoelements to be defined. The pseudoelement facility allows an element with name x and attribute/value pair a=b to be considered as if it were an element y. The <defs> section may contain any number of <pseudoelement> definitions. The syntax of a <pseudoelement> definition is:

<pseudoelement name="y">
<element name="x"/>
<attr-value name="a" value="b"/>
Pseudoelements are very useful in defining rendering rules for the <content-view> and <tree-view> sections.

Malcolm D. Hyman 2003-10-09