TAILIEUCHUNG - XML in 60 Minutes a Day phần 6

Chương này tập trung vào chuyển đổi các tài liệu XML cho đầu ra, nhưng không phải theo cùng một cách như Chương 7, "XML và Cascading Style Sheets," đã. Trong khi cascading style sheets liên quan đến phong cách trực quan đến một tài liệu XML để hiển thị cuối cùng của nó, những biến đổi | HAPTER XML Transformations This chapter focuses on transforming XML documents for output but not the same way as Chapter 7 XML and Cascading Style Sheets did. While cascading style sheets pertain to adding visual style to an XML document for its eventual display these Chapter 9 transformations prepare XML data for further processing. These transformations will utilize the Extensible Stylesheet Language Transformation XSLT language which is one component of the Extensible Stylesheet Language XSL family XSL XSLT and XPath. Unfortunately in a single introductory-level chapter like this we can only scratch the surface of XML transformations. But we ll show you the basics by discussing why transformations are necessary and explaining the operational model of a transformation that is how a transformation parser operates on a source XML document according to instructions in a specific style sheet to create a target document. We take you step-by-step through a simple transformation to introduce you to some of the considerations concepts components and syntax involved. In the lab exercises you will install and configure TIBCO Software Inc. s transformation software application called XMLTransform and then use it to do similar transformations. 331 332 Chapter 9 Why Transform XML Data More and more XML vocabularies and documents are being developed by organizations within common industries by individual organizations and by individuals themselves. They are drawn to XML by its capability to represent data with unique and arbitrary element type names its structuring capabilities and its human-readable nature. But because several data standards were already in existence when XML came along and several XML-related data standards have been developed since XML appeared two general data compatibility problems have arisen how to get XML to fit in with the existing nonXML standards and how to develop some level of compatibility among the XML-related vocabularies and data. Although XML

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