1 XSLT: The XML transformation languageBy Ragageethika

2 Contents What is XSLT XSL Vs HTML XSL Elements XSL TransformationsDemos

3 What is XSLT The World Wide Web Consortium (W3C) started to develop XSL because there was a need for an XML-based Style sheet Language. XSLT = XSL Transformations and is the most important part of XSL. XSLT is used to transform an XML document into another XML document, or another type of document that is recognized by a browser, like HTML. Normally XSLT does this by transforming each XML element into an HTML element. A common way to describe the transformation process is to say that XSLT transforms an XML source-tree into an XML result-tree.

4 XSL Vs HTML XSL stands for Extensible Style sheet Language.CSS is TML Style Sheets HTML uses predefined tags and the meaning of the tags are XSL = XML Style Sheets CSS does not support operations such as reordering and sorting elements based on a condition, and displaying only selective elements. XML does not use predefined tags (we can use any tag-names we like), and the meaning of these tags are not well understood. A

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7 XSL Elements xsl:Template indicates that there are child nodes/subdirectories. Syntax: xsl:value-of element can be used to extract the value of an XML element and add it to the output stream of the transformation Syntax : xsl:for-each element allows you to do looping in XSLT. It can be used to select every XML element of a specified node-set: Syntax :

8 XSL Elements Legal filter operators are: = (equal) != (not equal)< less than > greater than Syntax: Xsl:sort element is used to sort the output ,where to put the Sort information Syntax:

9 XSL Elements xsl:if element is used put a conditional if test against the content of the XML file, Syntax: Statements  

10 XSL Elements xsl:choose element is used in conjunction with and to express multiple conditional tests. Syntax:  

11 XSL Elements xsl:apply-templates element applies a template to the current element or to the current element's child nodes. If we add a select attribute to the element it will process only the child element that matches the value of the attribute. We can use the select attribute to specify the order in which the child nodes are processed.

12 Where does the XML transformation happen?There are three primary ways to transform XML documents into other formats, such as HTML, with an XSLT style sheet:  1. The XML document and associated style sheet are both served to the client (Web browser), which then transforms the document as specified by the style sheet and presents it to the user.  2. The server applies an XSLT style sheet to an XML document to transform it to some other format (generally HTML) and sends the transformed document to the client (Web browser).  3. A third program transforms the original XML document into some other format (often HTML) before the document is placed on the server. Both server and client only deal with the transformed document.

13 References ---- Learn XSLT