Friday, 2 February 2007

Lecture week 14 - XML and XPath

In this lecture I will discuss character encoding, an issue which arose form the workshop last week. It turns out that the essential problem here is the same as the problem which namespaces try to solve - how to mix data from multiple sources (here in multiple languages).

Then we do a bit of revision on XML structures and well-formedness, introducing the XML diagrammer in QSEE.

Then I look at the basics of XPath, a language for selecting parts of a XML document.

This leads into the continuation of last week's worksheet, extending the PHP script with the means to enter a place name and get the formatted forecast for that area.

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