XML summarized!

XML summarized!

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XML stands for Extensible Markup Language. It is a text-based format used to describe, deliver, and exchange structured data on the World Wide Web (WWW). XML is not a single markup language but a metalanguage. It allows developers to design a customized markup language. A well-formed XML page is created on the basis of the following rules:

1. All XML tags, container or empty, must be closed.


2. Empty tags require a forward slash (/) before the closing bracket.


3. All attributes must be quoted.


4. All XML tags are case sensitive.

• XML stands for Extensible Markup Language.


• XML is a W3C Recommendation.


• It is a markup language much like HTML.


• It was designed to describe data.


• XML tags are not predefined. A user must define his own tags.


• XML uses a Document Type Definition (DTD) or an XML Schema to describe data.


• XML does not allow interference of tags.


• XML documents that are not well formatted do not load in a browser.


• The Scalable Vector Graphics (SVG) file format uses XML to define vector two-dimensional images.


• In Secure XML, digital signatures are used to verify the origin of the document.


• In XML, tags can be in upper case or in lower case. However, XML tags are case sensitive.


• XML enhances the efficiency of text searches through custom tags.


• XML is very flexible but its flexibility depends on the browser's development.


• XML is derived from the Standard Generalized Markup Language (SGML).

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