XML

Extensible Markup Language (XML) is a set of rules for encoding documents in machine-readable form. It is defined in the XML 1.0 Specification produced by the W3C, and several other related specifications, all gratis open standards

XML's design goals emphasize simplicity, generality, and usability over the Internet. It is a textual data format with strong support viaUnicode for the languages of the world. Although the design of XML focuses on documents, it is widely used for the representation of arbitrary data structures, for example in web services.

Many application programming interfaces (APIs) have been developed that software developers use to process XML data, and several schema systems exist to aid in the definition of XML-based languages.

XML Table

Computational Method  

Molecular  Mechanics	Semi Empirical	Ab Initio
Very fast speed	Fast speed	Slow speed
Restriction parameters	Good accuracy	Very good accuracy
Very good protein	Good protein	Best protein
Modelling	Modelling	Modelling

XML Documentation

<computational table>
<method category="Molecular Mechanics">
<speed>very fast speed</speed>
<accuracy>restriction parameters</accuracy>
<protein modelling>very good protein modelling</protein modelling>
</method>
<method category="Semi Empirical">
<speed>fast speed</speed>
<accuracy>good accuracy</accuracy>
<protein modelling>good protein modelling</protein modelling>
</method>
<method category="Ab Initio">
<speed>slow speed</speed>
<accuracy>very good accuracy</accuracy>
<protein modelling>best protein modelling</protein modelling>
</method>
</computational table>

XML Tree

For more example and tutorial on XML,click here.