Define the lexical space, value space, and lexical mapping of the new type.

定义新类型的词汇空间、值空间和词汇映射。

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In the lexical space for the date datatype, representations for day, month, and year, will have the same representation as the ones defined in XML Schema 1.1 and the same rules.

在 date 数据类型的词汇空间中，日、月和年的表示法与 XML Schema 1.1 中定义的表示法相同，而且遵循相同的规则。

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