Content Management System Using XML

1
Content Management System Using XML

• Prital
  Shah

2
Course of Presentation

• Introduction
• What is XML ?
• What is a DTD?
• Applications of XML?

3
Introduction

• Web documents today have beome larger and more
  complex
• Web content providers today begun to experience
  limitations of a medium which does not provide
• - extensibility
• - structure
• - validation

4
What Is XML?

• eXtensible Markup Language
• XML is a method for putting structured data in a
  text file.
• - set of rules for designing text formats for
  data.
• - ease of generation and ease of readability.
• - unambiguous

5
What Is XML?(contd)

• XML looks a bit like HTML but isnt HTML.
• - is a superset of HTML.
• - user defined tags.
• - interpretation of data is completely left to
  the application that reads it.

6
What Is XML?(contd)

• XML is text but isnt meant to be read.
• - Not to be read by the users normally.
• - Only to be used by the experts to easily
  debug application.
• - Is to be used by the application only.

7
What Is XML?(contd)

• XML is license-free, platform-independent and
  well supported.
• - there may be a lot of tools that can help
  your application.
• - since it is a W3C technology, you can build
  your software around it.
• - you are also not tied to a single vendor.

8
Example.

• lt?xml version"1.0"?gt
• ltnamegt
• ltfirstgtJohnlt/firstgt
• ltlastgtDoelt/lastgt
• lt/namegt

9
Example.(contd)

• XML hierarchy

Document Root
Name
First
Last
10
DTD

• DOCUMENT TYPE DEFINITION
• Specifies rules or the grammar of what the XML
  document contains.
• lt?xml version"1.0"?gt
• lt!DOCTYPE name lt!ELEMENT name(first, last)gt gt
• ltnamegt
• ltfirstgtJohnlt/firstgt ltlastgtDoelt/lastgt
• lt/namegt

11
Applications of XML

• Applications that require the web client to
  mediate between two or more heterogeneous
  databases.
• Example
• Database interchange the universal hub
• In an information tracking system for a home
  health care agency.

12
Solution offered by hospital

• Become an authorized user.
• Access the patient's medical records using a Web
  browser.
• Log into the hospital's Web site.
• Print out the records from the browser.
• Manually key in the data from the printouts.

13
A Real Solution

• Log into the hospital's Web site.
• Become an authorized user.
• Access the patient's medical records in a
  Web-based interface that represents the records
  for that patient with a folder icon.
• Drag the folder from the Web application over to
  the internal database application.
• Drop it into the database.

14
Application of XML(cont )

• Applications that attempt to distribute a
  significant proportion of the processing load
  from the Web server to the Web client
• Example
• Data Delivery System designed by
  semiconductor industry.

15

• Each major semiconductor manufacuturer maintain
  several tera bytes of technical data for ICs
• To enable interchange of this data , an industry
  consortium designed an industry specific markup
  language.
• It enable intelligent applications not merely to
  display semiconductor data sheets as readable
  documents but actually to drive design processes.

16
Vision of near future

• Engineers can access a manufacturer's Web site
  and download not only viewable data on particular
  integrated circuits but also a Java applet that
  allows them to model those circuits in various
  combinations.
• Advantages
• data representation is platform and vendor
  independent
• Computation intensive process can run on Client
  side rathen then extended resource hit on server.

17
Applications of XML(cont)

• Applications that require the Web client to
  present different views of the same data to
  different users.
• Applications in which intelligent Web agents
  attempt to tailor information discovery to the
  needs of individual users.