XSL - XML STYLE SHEET
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This document discusses XML stylesheet language (XSL) which has two languages - XSL Transformation Language (XSLT) to convert XML documents to other formats, and XSL Formatting Objects Language (XSL-FO) to describe presentation of XML documents. It provides an example using an XML book document and XSL stylesheet to display book details by applying XSLT template rules and retrieving element values using <xsl:value-of> tags.
XSL - XML STYLE SHEET
- 1. XSL XML STYLE SHEET LANGUAGE SARASWATHI RAMALINGAM SRI AKILANDESWARI WOMENS COLLEGE
- 2. XSL • XSL has two independent languages: – The XSL Transformation Language (XSLT) – The XSL Formatting Object Language (XSL-FO) • XSLT is used to convert an XML document to another format. • XSL-FO provides a way of describing the presentation of an XML document.
- 3. book.xml <?xml version=”1.0”?> <book> <author>Michael Daconta et al</author> <title>XML Development with Java 2</title> <category>Java</category> <price currency=”USD”>44.99</price> <summary> XML Development with Java 2 provides the information and techniques a Java developer will need to integrate XML into Java-based applications. </summary> </book>
- 4. book.xml • In this example, we will apply the style sheet in a client-side Web browser. • The XML document makes a reference to a style sheet using the following code: <?xml-stylesheet type=”text/xsl” href=”book_view.xsl”?>
- 5. Creating the XSL Style Sheet <?xml version=”1.0”?> <xsl:stylesheet xmlns:xsl=”URI” version=”1.0”> <!--XSL-T CONVERSION RULES--> </xsl:stylesheet>
- 6. • The <xsl:stylesheet> element defines how the XSLT processor should process the current XSL document. • The xmlns attribute is the namespace definition. • The XSL Transformation engine reads the xmlns attribute and determines whether it supports the given namespace.
- 7. • The xmlns attribute specifies the XSL prefix. • All XSL elements and types in the document use the prefix. • The xmlns attribute value contains a Uniform Resource Identifier (URI), which serves as a generic method for identifying entities on the World Wide Web. • It is important to note that the XSLT processor will not connect to the URI; it simply compares the URI against a collection of URIs that it supports.
- 8. • The XSL style sheet contains HTML text and XSL elements. • The HTML text forms the basis of the desired output page. • The XSL elements are template rules for the XSLT processor. • A template is associated with a given element in the XML document.
- 9. • In our example, a template is defined to match on the <book> element using the following code: <xsl:template match=”/book”> <!--static text and xsl rules --> </xsl:template>
- 10. • XSLT defines the <xsl:value-of> element for retrieving data from a XML document. • The <xsl:value-of> element contains a select attribute. • This attribute value is the name of the actual XML element you want to retrieve. For example <xsl:value-of select=”title” />
- 11. book_view.xsl <?xml version=”1.0”?> <xsl:stylesheet xmlns:xsl=”http://www.w3.org/1999/XSL/Transform” version=”1.0”> <xsl:template match=”/book”> <html><body> <b>Title: </b> <xsl:value-of select=”title” /> <p/> <b>By: </b> <xsl:value-of select=”author” /> <p/> <b>Cost: </b> <xsl:value-of select=”price” /> <p/> <b>Category: </b> <xsl:value-of select=”category” /> <p/> <b>Description</b> <p/> <i><xsl:value-of select=”summary” /></i> </body></html> </xsl:template> </xsl:stylesheet>