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338 XML STYLESHEET LANGUAGE FOR TRANSFORMATIONS This instruction tells XSL to remove any text nodes under SECT elements that contain nothing but whitespace. Nodes that contain text other than whitespace will not be affected, and other kinds of nodes are not affected. Now, when you run the program, the result looks like this: <html> <body> <h1 align="center">A Sample Article</h1> <h2>The First Major Section </h2> <p>This section will introduce a subsection.</p> <h3>The Subsection Heading </h3> <p>This is the text of the subsection. </p> </body> </html> That’s quite an improvement. There are still newline characters and white space after the headings, but those come from the way the XML is written: <SECT>The First Major Section ____<PARA>This section will introduce a subsection.</PARA> ^^^^ Here, you can see that the section heading ends with a newline and indentation space, before the PARA entry starts. That’s not a big worry, because the browsers that will process the HTML routinely compress and ignore the excess space. But there is still one more formatting tool at our disposal. Note: The stylesheet described here is article1c.xsl. The result is stylizer1c.html. (The browser-displayable versions are article1c-xsl.html and stylizer1c-src.html.)
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