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引用次数: 20
摘要
网络上的数据大多采用 XML 格式,因此经常需要更新它们的结构,这些结构通常由 XML 模式描述。当模式被修改时,需要面对修改对文档的影响。XSUpdate 是一种语言,可以轻松识别 XML 模式的各个部分,对其应用修改原语,并最终定义相关文档的适配,而 Eχup 则是处理模式修改和文档适配语句的相应引擎。本演示的目的是概述 XSUpdate 语言和 Eχup 系统的功能。
Updating XML schemas and associated documents through exup
Data on the Web mostly are in XML format and the need often arises to update their structure, commonly described by an XML Schema. When a schema is modified the effects of the modification on documents need to be faced. XSUpdate is a language that allows to easily identify parts of an XML Schema, apply a modification primitive on them and finally define an adaptation for associated documents, while Eχup is the corresponding engine for processing schema modification and document adaptation statements. Purpose of this demonstration is to provide an overview of the facilities of the XSUpdate language and of the Eχup system.