TUTORIAL 6

Reviews
Shared by: techmaster
Stats
views:
37
rating:
not rated
reviews:
0
posted:
10/29/2008
language:
English
pages:
0
TUTORIAL 6 WORKING WITH XSLT New Perspectives on XML 1 OBJECTIVES In this chapter, you will learn: What is XSL To create an XSLT style sheet The syntax of the XPath language To transform an XML document into HTML To sort an XML document To create elements and attributes in HTML New Perspectives on XML 2 WORKING WITH XSL XSL = eXtensible Stylesheet Language Allows you to make up your own styles We will create a new style right at the end of the chapter New Perspectives on XML 3 INTRODUCING XSLT AND XPATH XSLT is used to transform XML content into another presentation format  Read data from an XML document and output it into another document  Turns an XML document into an HTML document on the fly Add HTML tags New Perspectives on XML 4 INTRODUCING XSLT AND XPATH XPath enables a XSLT style sheet to reference elements in a XML document  XML document is a tree structure – each element is a node   References can be absolute or relative Similar to traversing the file system in DOS with the CD command New Perspectives on XML 5 INTRODUCING XSLT AND XPATH Portfolio Date Stock Name Description Category Five_day Day Open Close High Low New Perspectives on XML 6 Nodes NODES HAVE RELATIONSHIPS Date/time is child of Portfolio Portfolio is ancestor of Name Portfolio Date Stock Name Description Category Five_day Day Open Portfolio is parent of date/time Name is descendent of Portfolio Close High Low New Perspectives on XML 7 REFERENCING NODES Portfolio Date Stock Name Description Category Absolute Paths      Five_day Day Open Close High Low  / (root) /Portfolio /Portfolio/Date /Portfolio/Stock/Name /Portfolio/Stock/Five_day/ Day //Description (all occurrences of this node) New Perspectives on XML 8 REFERENCING NODES Portfolio Date Stock Name Description Category Relative Paths     / (root) child child/child .. (parent) Five_day Day Open Close High Low New Perspectives on XML 9 REFERENCING ATTRIBUTES Portfolio Date Stock Name Description Category Five_day Symbol /Portfolio/Stock/Name/@Symbol Day Open Close High Low New Perspectives on XML 10 XSLT STYLE SHEETS An XSLT style sheet document is itself an XML document An XSLT style sheet document has an extension .xsl New Perspectives on XML 11 CREATING AN XSLT STYLE SHEET • XSLT style sheet general structure: Content of the style sheet xsl: is the XSL namespace. It identifies the element as an xsl command. New Perspectives on XML 12 CREATING A TEMPLATE Template = defines how a section of the source document should be transformed To create a template, the syntax is: XSLT and Literal Result Elements where node is a specific element name from the source document New Perspectives on XML 13 CREATING A TEMPLATE A template contains two types of content   XSLT elements send commands to the XSLT processor A literal result element is text sent to the result document, but not acted upon by the XSLT processor New Perspectives on XML 14 CREATING THE ROOT TEMPLATE The root template sets up the initial code for the result document To create a root template, the syntax is: XSLT and Literal Result Elements New Perspectives on XML 15 CREATING THE ROOT TEMPLATE EXAMPLE New Perspectives on XML 16 SPECIFYING THE OUTPUT METHOD By default, the XSLT processor will render the result document as an XML file To control how the processor formats the source document, you can specify the output method using the element New Perspectives on XML 17 ATTRIBUTS OF THE ELEMENT method – output format: xml, html, text version – version of the output New Perspectives on XML 18 TRANSFORMING A DOCUMENT A browser with a built-in XSLT processor allows you to view the result document Alternatively, most XSLT processors provide the capability to create the result document as a separate file New Perspectives on XML 19 VIEWING THE RESULT DOCUMENT IN A BROWSER Internet Explorer 6.0 contains built-in XSLT processor You can view the results of the transformation by opening the XML document in the browser New Perspectives on XML 20 INSERTING A NODE VALUE To insert a node’s value into the result document: where XPath identifies the node from the source document’s node tree If the node contains child elements in addition to text content, the text in those child nodes appears as well New Perspectives on XML 21 INSERTING A NODE VALUE EXAMPLE New Perspectives on XML 22 WORKING WITH TEMPLATES We have already seen how to create a template: To apply a template in the result document: where XPath indicates the node in the document for which a template has been created. New Perspectives on XML 23 TEMPLATE EXAMPLE New Perspectives on XML 24 Template Example means “display the value of whatever node has been selected”. So if the XPath in xsl:apply-templates points to “name”, select=“.” will cause the data in the name element to be displayed. New Perspectives on XML 25 BUILT-IN TEMPLATES There is a default template for each node. The built-in template for text nodes causes their values to appear in the result document To force the built-in templates to display all data in a document New Perspectives on XML 26 CREATING TEMPLATES See pages 6.28-6.38 New Perspectives on XML 27 SORTING NODES By default, nodes are processed in document order, by their appearance in the document To specify a different order: New Perspectives on XML 28 SORTING NODES Attributes of :   data-type indicates the type of data order indicates the direction of the sorting (ascending or descending) goes “inside” the xsl:applytemplates tag: New Perspectives on XML 29 CREATING ELEMENTS AND ATTRIBUTES To create an element (tag) in the output file, use the tag To create an attribute of an element (tag) in the output file, use the tag New Perspectives on XML 30 CREATING ELEMENTS AND ATTRIBUTES For example, an element in the XML document should be displayed as a hyperlink in the output HTML document  In the XML document: www.yahoo.com Yahoo  Transform to Yahoo New Perspectives on XML 31 CREATING ELEMENTS AND ATTRIBUTES New Perspectives on XML 32 SUMMARY Extensible Style sheet Language,or XSL, includes: XSLT and XPath XPath is used to reference a node Templates format sections of the XML document and transform XML data into a variety of formats New Perspectives on XML 33 SUMMARY Nodes can be sorted in either alphabetical or numerical order You can insert new elements and attributes in the transformed document New Perspectives on XML 34

Related docs
Linux tutorial
Views: 101  |  Downloads: 21
TUTORIAL NO 2
Views: 0  |  Downloads: 0
TUTORIAL NO 1
Views: 0  |  Downloads: 0
SPSS tutorial
Views: 1041  |  Downloads: 97
Tutorial Tutorial
Views: 306  |  Downloads: 23
TUTORIAL TUTORIAL
Views: 573  |  Downloads: 12
AutoCAD Tutorial
Views: 320  |  Downloads: 72
Manga Tutorial
Views: 1045  |  Downloads: 61
MySQL Tutorial
Views: 99  |  Downloads: 25
Excel Tutorial
Views: 1780  |  Downloads: 239
Tutorial 6
Views: 19  |  Downloads: 0
TUTORIAL 6
Views: 27  |  Downloads: 2
Tutorial on
Views: 52  |  Downloads: 1
TUTORIAL
Views: 28  |  Downloads: 1
Tutorial
Views: 34  |  Downloads: 0
Other docs by techmaster