Extensible markup language ppt as part of Internet Technology
- 1. XML
- 3. âą What is xml âą Xml (eXtensible Markup Language) is a mark up language. âąXML is designed to store and transport data. âą Xml was released in late 90âs. it was created to provide an easy to use and store self describing data. âą XML became a W3C Recommendation on February 10, 1998. âąXML is not a replacement for HTML. âąXML is designed to be self-descriptive. âąXML is designed to carry data, not to display data. âąXML tags are not predefined. You must define your own
- 17. Features and Advantages of XML âą XML is widely used in the era of web development. It is also used to simplify data storage and data sharing. âą The main features or advantages of XML are given below. âą 1) XML separates data from HTML âą If you need to display dynamic data in your HTML document, it will take a lot of work to edit the HTML each time the data changes. âą With XML, data can be stored in separate XML files. This way you can focus on using HTML/CSS for display and layout, and be sure that changes in the underlying data will not require any changes to the HTML.
- 18. 2) XML simplifies data sharing âą In the real world, computer systems and databases contain data in incompatible formats. âą XML data is stored in plain text format. This provides a software- and hardware-independent way of storing data. âą This makes it much easier to create data that can be shared by different applications.
- 19. âą 3) XML simplifies data transport âą One of the most time-consuming challenges for developers is to exchange data between incompatible systems over the Internet. âą Exchanging data as XML greatly reduces this complexity, since the data can be read by different incompatible applications.
- 20. 4) XML simplifies Platform change âą Upgrading to new systems (hardware or software platforms), is always time consuming. Large amounts of data must be converted and incompatible data is often lost. âą XML data is stored in text format. This makes it easier to expand or upgrade to new operating systems, new applications, or new browsers, without losing data.
- 21. 5) XML increases data availability âą Different applications can access your data, not only in HTML pages, but also from XML data sources. âą With XML, your data can be available to all kinds of "reading machines" (Handheld computers, voice machines, news feeds, etc), and make it more available for blind people, or people with other disabilities.
- 22. âą XML documents create a hierarchical structure looks like a tree so it is known as XML Tree that starts at "the root" and branches to "the leaves". Example of XML Document XML documents uses a self-describing and simple syntax: <?xml version="1.0" encoding="ISO-8859-1"?> <note> <to>Tove</to> <from>Jani</from> <heading>Reminder</heading> <body>Don't forget me this weekend!</body> </note> The first line is the XML declaration. It defines the XML version (1.0) and the encoding used (ISO- 8859-1 = Latin-1/West European character set). The next line describes the root element of the document (like saying: "this document is a note"):
- 23. âą XML documents must contain a root element. This element is "the parent" of all other elements. âą The elements in an XML document form a document tree. The tree starts at the root and branches to the lowest level of the tree. âą All elements can have sub elements (child elements). <root> <child> <subchild>.....</subchild> </child> </root> Example : https://www.javatpoint.com/xml-example
Editor's Notes
- #31: Extended BackusâNaur Form (EBNF) is a metasyntax notation used in computer science to describe the grammar of a language.