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面试准备

XML 面试题与答案

Answer:

XML is the Extensible Markup Language. It improves the functionality of the Web by letting you identify your information in a more accurate, flexible, and adaptable way.
It is extensible because it is not a fixed format like HTML (which is a single, predefined markup language).
Instead, XML is actually a metalanguage, a language for describing other languages which lets you design your own markup languages for limitless different types of documents.
XML can do this because it's written in SGML, the international standard metalanguage for text document markup (ISO 8879).

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