Databases Reference
In-Depth Information
Native XML databases
This chapter covers
Building native XML database applications
Using XML standards to accelerate application
development
Design and validate documents with XML schemas
Extending XQuery with custom modules
The value of a standard is proportional to the square of the number of systems
that use it.
—rephrasing of Metcalfe's law
and the network effect as applied to standards
Have you ever wanted to perform a query on the information in a web page, a
Microsoft Word document, or an Open Office presentation? Just think, if you have
links in an
HTML
page, wouldn't it be nice to run a query to validate that all the
links are working? All of these document types have a common property referred
to as
mixed content
(data containing text, dates, numbers, and facts). One of the
challenges of using document databases is that they don't support the use of que-
ries on mixed content. Native
XML
databases, which have been around longer than
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