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XML was designed to be self-descriptive, (#33643)

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yuktaanand
2018-12-16 20:26:57 +05:30
committed by Randell Dawson
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guide/english/xml/index.md
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@ -3,9 +3,8 @@ title: Extensible Markup Language (XML)
--- ---
## Extensible Markup Language (XML) ## Extensible Markup Language (XML)
XML stands for eXtensible Markup Language. It is extensible, because it does not use a predefined set of tags for identifying structural components; instead, it provides a mechanism for defining such sets of tags. In XML, tags specify meaning rather than presentation, and the main purpose of the language is to share data: XML is a format that is both human- and machine-readable. XML stands for eXtensible Markup Language. It is extensible, because it does not use a predefined set of tags for identifying structural components; instead, it provides a mechanism for defining such sets of tags. In XML, tags specify meaning rather than presentation, and the main purpose of the language is to share data: XML is a format that is both human- and machine-readable. XML was designed to be self-descriptive. XML became a W3C Recommendation as early as February, 1998.
XML became a W3C Recommendation as early as February, 1998.
## Syntax of XML ## Syntax of XML
XML syntax refers to the rules that determine how an XML application can be written. The XML syntax is very straight forward, and this makes XML very easy to learn. XML syntax refers to the rules that determine how an XML application can be written. The XML syntax is very straight forward, and this makes XML very easy to learn.
@ -18,9 +17,9 @@ title: Extensible Markup Language (XML)
</child> </child>
</root> </root>
``` ```
#### XML must have a root element #### XML must have a root element
XML documents must contain one root element that is the parent of all other elements: XML documents must contain one root element that is the parent of all other elements:
``` ```
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
@ -33,7 +32,7 @@ XML documents must contain one root element that is the parent of all other elem
``` ```
In the above example 'note' is the root element. In the above example 'note' is the root element.
## Advantages of using XML: ## Advantages of using XML:
* Simplicity - XML documents are ordinary text files that can be created and edited with any text editor. * Simplicity - XML documents are ordinary text files that can be created and edited with any text editor.
* Vendor independence - XML can be read and written with non-proprietary systems * Vendor independence - XML can be read and written with non-proprietary systems
@ -58,11 +57,11 @@ As you can see, XML is quite similar to HTML, but the difference lies in the fun
There is a main thing between XML and HTML which makes them different from each other. It is that XML was designed to carry a particular information and focuses on that informaion only. And HTML focuses on displaying that particular Information like design and all these stuff regarding the information. There is a main thing between XML and HTML which makes them different from each other. It is that XML was designed to carry a particular information and focuses on that informaion only. And HTML focuses on displaying that particular Information like design and all these stuff regarding the information.
There are two primary differences between XML and HTML: There are two primary differences between XML and HTML:
1. XML was designed to describe data; whereas, HTML was designed to display data. 1. XML was designed to describe data; whereas, HTML was designed to display data.
2. HTML uses predefined tags while XML uses user defined tags. 2. HTML uses predefined tags while XML uses user defined tags.
XML helps simplify: XML helps simplify:
1. data sharing 1. data sharing
2. data transport 2. data transport
3. platform changes 3. platform changes
@ -73,8 +72,8 @@ It became a W3C Recommendation as early as in February 1998!
## Transform to HTML with XSL ## Transform to HTML with XSL
As mentioned above, XML is primarirly used to carry data, but there are some scenarios where you to represent the information in more user friendly way. As mentioned above, XML is primarirly used to carry data, but there are some scenarios where you to represent the information in more user friendly way.
For this we have XSLT(eXtensible Stylesheet Language Transformations) or simply XSL, with help of it we can represent the XML data in HTML. For this we have XSLT(eXtensible Stylesheet Language Transformations) or simply XSL, with help of it we can represent the XML data in HTML.
XML + XSL = HTML XML + XSL = HTML
### More information ### More information