XML - Extensive Markup Language

XML - Extensive Markup Language

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  iFour ConsultancyXML web Engineering|| winter 2017 wahidullah Mudaser assignment.cs2017@gmail.com  Lecture 11  Introduction to XML
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   What isXML?  The main difference between XML and HTML  XML Simplifies Things  Features of XML  Efficiency of XML  Examples OUTLINE
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   XML standsfor EXtensible Markup Language  XML is a markup language much like HTML.  XML was designed to describe data.  XML tags are not predefined in XML. You must define your own tags.  XML is self describing.  XML uses a DTD (Document Type Definition) to formally describe the data. What is XML
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   The XMLabove is quite self-descriptive:  It has sender information.  It has receiver information  It has a heading  It has a message body.  But still, the XML above does not DO anything. XML is just information wrapped in tags. XML Does Not DO Anything Note To: Khalid From: Ahmad Reminder Don’t forget me this weekend!
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   XML isnot a replacement for HTML.  XML and HTML were designed with different goals:  XML was designed to describe data and to focus on what data is.  HTML was designed to display data and to focus on how data looks.  HTML is about displaying information, XML is about describing information. Difference between XML and HTML
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   It simplifiesdata sharing  It simplifies data transport  It simplifies platform changes  It simplifies data availability  Many computer systems contain data in incompatible formats.  Exchanging data between incompatible systems (or upgraded systems) is a time- consuming task for web developers.  Large amounts of data must be converted, and incompatible data is often lost. XML Simplifies Things
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   XML storesdata in plain text format. This provides a software- and hardware- independent way of storing, transporting, and sharing data.  XML also makes it easier to expand or upgrade to new operating systems, new applications, or new browsers, without losing data.  With XML, data can be available to all kinds of "reading machines" like people, computers, voice machines, news feeds, etc. Cont…
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   Elements haveboth an opening and a closing tag  Elements follow a strict hierarchy, with documents containing only one root element  Elements cannot overlap other elements  Element names must obey XML naming conventions  XML is case sensitive. Feature of XML
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   XML willimprove the efficiency of data exchange in several important ways, which include:  write once and format many times  hardware and software independence  write once and exchange many times  Faster and more precise web searching  data validation Efficiency of XML
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  1. XML isa widely accepted open standard. 2. XML allows to clearly separate content from form (appearance). 3. XML is text-oriented. 4. XML is extensible. 5. XML is self-describing. 6. XML is universal; meaning internationalization is no problem. 7. XML is independent from platforms and programming languages. 8. XML provides a robust and durable format for information storage. 9. XML is easily transformable. 10. XML is a future-oriented technology. 10 reason to use XML
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  Example
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