THE XML REVOLUTION - TECHNOLOGIES FOR THE FUTURE WEB

Query language requirements

The W3C Query Working Group has identified many technical requirements:

at least one XML syntax (at least one human-readable syntax)
must be declarative
must be protocol independent
must respect XML data model
must be namespace aware
must coordinate with XML Schema
must work even if schemas are unavailable
must support simple and complex datatypes
must support universal and existential quantifiers
must support operations on hierarchy and sequence of document structures
must combine information from multiple documents
must support aggregation
must be able to transform and to create XML structures
must be able to traverse ID references

In short, it must be SQL generalized to XML!

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