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Home > Online Product Documentation > Table of Contents > About Modifiers in Element Definitions in DTDs About Modifiers in Element Definitions in DTDsWhen you define an element, you specify one or more modifiers. A modifier specifies a rule about the structure or occurrence of the element being defined. An element can have only one top-level modifier. However, you can add one or more modifiers to the top-level modifier. A modifier can aggregate elements or other modifiers. This section discusses the following topics: |
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