Exchanging PostgreSQL Data with XML
XML is the wave of the future. Well, it's a wave in some future anyway. XML was designed to let you and I write applications that can exchange structured data. An XML document is a self-describing textual representation of data, often structured in a hierarchical form. In this section, I'll assume that you have some knowledge of XML, XPath queries, and XSLT stylesheets. If you aren't familiar with those technologies, read on—I'll show you a few examples that should help you understand the basic concepts.
You can store XML data in a PostgreSQL database without any help from third-party software. For example, let's say that one of your distributors offers a new service to the video store that you're running. ...
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