Technologies building on top of XML

The real force of XML is generic languages and tools!

We need:

namespaces

- to avoid name clashes when a document uses several "sub-languages"

schemas (grammars)

- to define classes of documents (DTD is not good enough...)

linking between documents

- a generalization of HTML anchors and links

addressing parts of documents

- it is not enough that only the author can place anchors

transformation

- conversion from one document class to another

querying

- extraction of information

Other related technologies (not covered here):

RDF (Resource Description Framework)

- a framework for metadata (statements about properties and relationships)

XML-Signature

- digital signatures of Web resources

XML Fragment Interchange

- dealing with fragments of XML documents