| Processing XML with Perl |  | Michel Rodriguez |
 The XML syntax |  |  What changes with XML |
Why is XML important?
XML describes data. This data can be processed.
XML data can be:
- stored
- exchanged in a neutral, self-documented way
- extracted and re-used
- updated
- displayed in various ways (write once, published many times)
- when all else fails it can still be accessed using vi
XML provides a standard, well-defined, layer on top of which applications can be built.
XML allows the definition of interfaces between loosely-coupled applications.
the hierarchical (tree) model is very powerful.
XML comes with many tools.
| The XML syntax | | What changes with XML |