TAILIEUCHUNG - Lecture E-Commerce - Chapter 19: eXtensible Markup Language (XML) (part II)

Lecture E-Commerce - Chapter 19: eXtensible Markup Language (XML) (part II). In this chapter students will be able to: XML elements are extensible, XML attributes, XML namespaces, XML encoding, viewing XML files. | CSC 330 E-Commerce Teacher Ahmed Mumtaz Mustehsan GM-IT CIIT Islamabad Virtual Campus, CIIT COMSATS Institute of Information Technology T2-Lecture-4 eXtensible Markup Language (XML) Part - II For Lecture Material/Slides Thanks to: Objectives XML Elements are extensible XML Attributes XML Namespaces XML Encoding Viewing XML Files T2-Lecture-4 Ahmed Mumtaz Mustehsan XML Elements are Extensible XML elements can be extended to carry more information. Look at the following XML example: mumtaz tariq Dont forget to attend party on weekend! Lets imagine that we created an application that extracted the , , and elements from the XML document to produce this output: T2-Lecture-3 Ahmed Mumtaz Mustehsan Message To: Mumtaz From: Tariq Dont forget to attend party on weekend! XML Elements are Extensible Imagine that the author of the XML document added some extra information to it: 2008-01-10 Mumtaz Tariq Reminder Dont forget to attend party on weekend! Should the application break or crash? No. The application should still be able to find the , , and elements in the XML document and produce the same output. One of the beauty of XML, is that it can be extended without breaking applications. T2-Lecture-3 Ahmed Mumtaz Mustehsan Message To: Mumtaz From: Tariq Dont forget to attend party on weekend! XML Attributes XML Attributes In HTML, attributes provide additional information about elements: XML elements can have attributes, just like HTML. Attributes often provide information that is not a part of the data but it is information about data. Example The file type is irrelevant to the data, but can be important to the .

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