15. XML
Like everything metaphysical, the harmony between thought and reality is to be found in the grammar of the language.
—Ludwig Wittgenstein
I played with an idea, and grew willful; tossed it into the air; transformed it; let it escape and recaptured it; made it iridescent with fancy, and winged it with paradox.
—Oscar Wilde
Objectives
In this chapter you’ll:
• Mark up data using XML.
• Learn how XML namespaces help provide unique XML element and attribute names.
• Create DTDs and schemas for specifying and validating the structure of an XML document.
• Create and use simple XSL style sheets to render XML document data.
• Retrieve and manipulate XML data programmatically using JavaScript.
Outline
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