XML stands for eXtensible Markup Language. It's a markup language much like HTML. XML was designed to describe data. The tags in XML are not predefined as you need to define your own tags. It also uses a DTD (Document Type Definition) to describe the data. XML with a DTD is designed to be self describing.
XML Table:
Computational Method
| Molecular Mechanics | Semi Reciprocal | Ab initio |
| Very Fast Speed | Fast Speed | Slow Speed |
| Parameter Restriction | Good Accuracy | Very Good Accuracy |
XML Tree:
XML Syntax:













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