The template-based grammar defines fields in which a user provides data.

基于模板的语法将定义用户在其中提供数据的字段。

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XML forms Architecture (XFA). XFA provides a template-based grammar and a set of processing rules that allow users to build interactive forms.

XML Forms Architecture (XFA)： XFA将提供基于模板的语法和处理规则集，它们将允许用户构建交互式表单。

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The grammar class is a template class that is parameterized by its derived class DerivedT and the context class ContextT. The declaration for the grammar class is as follows.

grammar类是一个模板类，被其派生类DerivedT和上下文类ContextT参数化。

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