You Just Need to Go through this once :)
XML can be used to exchange, share, and store data.
XML documents form a tree structure that starts at "the root" and branches to "the leaves".
XML has very simple syntax rules. XML with correct syntax is "Well Formed". Valid XML also validates against a DTD.
XSLT is used to transform XML into other formats like HTML.
All modern browsers have a build-in XML parser that can read and manipulate XML.
The DOM (Document Object Model) defines a standard way for accessing XML.
The XMLHttpRequest object provides a way to communicate with a server after a web page has loaded.
XML Namespaces provide a method to avoid element name conflicts.
Text inside a CDATA section is ignored by the parser.
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What to Study Next?
Our recommendation is to learn about the XML DOM and XSLT.
If you want to learn more about validating XML, we recommend DTD and XML Schema.
Below is a short description of each subject.
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XML DOM (Document Object Model)
The XML DOM defines a standard way for accessing and manipulating XML documents.
The XML DOM is platform and language independent and can be used by any programming language like Java, JavaScript, and VBScript.
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XSLT (XML Stylesheet Language Transformations)
XSLT is the style sheet language for XML files.
With XSLT you can transform XML documents into other formats, like XHTML.
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XML DTD (Document Type Definition)
The purpose of a DTD is to define what elements, attributes and entities is legal in an XML document.
With DTD, each of your XML files can carry a description of its own format with it.
DTD can be used to verify that the data you receive, and your own data, is valid.
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XML Schema
XML Schema is an XML based alternative to DTD.
Unlike DTD, XML Schemas has support for datatypes, and XML Schema use XML Syntax.
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