SUMMARY:   One of the primary advantages to using XML is the ability to created multiple data representations from a single data source. In the case of this class, we will look at how to create DTDs and Schemas to help organize your data, then use XSL to create multiple different HTML views of the data. We will also see how Style Sheets (CSS) can be used to represent XML data directly in the browser. AUDIENCE:   Webmasters and others interested in taking advantage of XML's create-one, use-many-times methodologies. PREREQUISITES:   The participants have a basic knowledge of HTML. DURATION:   3 Days. APPROACH:   This class is taught by lecture with hands-on workshops. COURSE CONTENT:   Upon successful completion of this course, the student will be familiar and have worked with each of the following: HISTORY AND DEVELOPMENT Markup languages SGML HTML XML APPLICATIONS/USES Middle-tier for data transfer Intelligent data in documents Single source-multiple output Delivering intelligent data to the browser XML TOOLS XML viewers XML parsers XML editors XML SYNTAX Tags Elements Attributes Comments Processing Instructions Exercise: Create a simple document using XML markup. XML STRUCTURE Well-formed structure Valid structure DTDs and Schemas - why and when to use them Exercise: Check if our document is well-formed. DATA AND DOCUMENT STRUCTURE Components of a document Components of a data structure Exercise: Analyze documents and data sets in plain English. DOCUMENT TYPE DEFINITION (DTD) Definition Defining an element Element occurrence indicators Element content models Defining an attribute Attribute content models Specifying choices and default values Entities Internal entities External entities Internal and external DTDs Specifying the DTD to the XML document Using the DTD to validate an XML document Exercise: Write DTDs based on our analysis in the prior unit. SCHEMAS Definition ElementType tag - defining elements AttributeType tag - defining attributes Element tag - using elements in an ElementType definition Attribute tag - using attributes in an ElementType definition Group tag - defining sets of elements in an ElementType Datatypes Descriptions Defining the Schema namespace Using the Schema to validate an XML document Exercise: Write Schemas to reflect the structures of the DTDs. CSS (STYLE SHEETS) WITH XML Definition XML without a style sheet Associating a style sheet with an XML document Creating text blocks Fonts, sizes, bold, italics and other character styles Using margins and borders to create text boxes Creating tables Collapsing text with display:none Exercise: Create style sheets to display our sample documents in a browser. XSL Basic command set: xsl:template Basic command set: xsl:value-of Basic command set: xsl:for-each Basic command set: xsl:apply-templates Exercise: xsl_ex2.xml Exercise: Write XSL stylesheets that will convert several XML files into HTML for display in a browser.