XML Extensible Markup Language

1
XMLExtensible Markup Language

• Standard supported by W3C
• (World Wide Web Consortium)
• HTML End user oriented (presentation)
• XML Application oriented (shared data)
• XML has no predefined set of tags.
• The application determine tags meaning.

2
XML
Attributes Name

• lt?xml version"1.0" encoding"utf-8" ?gt
• ltrootgt
• ltEmployees EmployeeID"1" LastName"Davolio"
  FirstName"Nancy" Title"Sales Representative"
  TitleOfCourtesy"Ms." BirthDate"1948-12-08T000
  000" HireDate"1992-05-01T000000"
  Address"507 - 20th Ave. E. Apt. 2A"
  City"Seattle/gt
• ltEmployees EmployeeID"2" LastName"Fuller"
  FirstName"Andrew" Title"Vice President,
  Sales" TitleOfCourtesy"Dr." BirthDate"1952-02-
  19T000000" HireDate"1992-08-14T000000"
  Address"908 W. Capital Way" City"Tacoma"/gt
• ltlt/rootgt

Attribute Value
Record Type
3
XSLExtensible Stylesheet Language
Language used to describe how an XML source
document is transformed.
IIS
XML
HTML
Parser
Internet
XSL
Rules
Rules
Rules
Rules
4
XSL
Transform all records...

• ltxslstylesheet version"1.0"gt
• ltxsltemplate match""gt
• ltxsltemplate match"Employees"gt
• ltxsltemplate match"/"gt
• lt/xslstylesheet

... Identified with TAG Employees...
...begining at document root
5
XSL
Set title color...

• ltxslstylesheet version"1.0"gt
• ltxsltemplate match""gt
• ltxsltemplate match"Employees"gt
• ltxsltemplate match"/"gt
• lt/xsltemplategt
• lt/xslstylesheet

Create table title...
ltHTMLgt lt/HTMLgt
ltHEADgt ltSTYLEgtcolorCCCCCC lt/STYLEgt lt/HEADgt
Recursion...
ltBODYgt lt/BODYgt
ltTABLE border"1" style"width300"gt ltTRgtltTH
colspan"2"gtEmployeeslt/THgtlt/TRgt ltTRgtltTHgtFirst
namelt/THgtltTHgtLast namelt/THgtlt/TRgt
ltxslapply-templates select"root" /gt lt/TABLEgt
6
XSL
For each record...

• ltxslstylesheet version"1.0"gt
• lt?xml version"1.0" encoding"UTF-8" ?gt
• ltxsltemplate match""gt
• ltxsltemplate match"Employees"gt
• ltTRgt
• ltTDgt
• ltxslvalue-of select"_at_FirstName" /gt
• lt/TDgt
• ltTDgt
• ltxslvalue-of select"_at_LastName" /gt
• lt/TDgt
• lt/TRgt
• lt/xsltemplategt
• ltxsltemplate match"/"gt
• lt/xslstylesheet

Create one Table Row ltTRgt with First Name and
Last Name
7
HTML
8
URL Access
Example
http//IIServer/northwind?sql....FORXMLAUTOx
sl....

• Protocol http
• Server IIServer
• Database northwind
• SQL Statement SELECT FROM employees
• Output Format FORXMLAUTO
• XSL tranformation xsl....

9
Java Applet

• 1. Portable
• 2. Embedded into web-pages.
• Easy navigation and distribution
• 3. Uses Java XML parser to exract information or
  specify XSL transformations for display.
• Processing capabilities
• Different presentations
• http//cimic.rutgers.edu/ahgomaa/XMLapplet.htm