The IBM developerWorks site has a new tutorial posted today with information about using PHP and XSL to create a DHTML link graph.

In this tutorial, you learn to build a link graph with XML, PHP, and JavaScript code. Link graphs are paragraphs of keywords in which the size of each word depends on some data value -- in this case, the frequency of the term. The more often the term occurs, the larger the font size of the word.

This tutorial shows how to build an RSS parser that in turn builds a keyword list along with the word frequencies. It also demonstrates how to use XSLT to create an HTML page that shows the link graph and relates its term to its original article.

As per usual, they provide plenty of explaination and lots of code to help you along the way. This is a pretty cool little tutorial, tying in several technologies into a simple, clean app...