<prevpage> links to the previous page in the same directory. Files
in a directory are sorted alphabetically, making this ideal for glossary
By prepending every file with a number, you can force your own order,
<prevpage> ideal for wizards,
step-by-step-guides, or other logically ordered content.
<prevpage> tag has no attributes.
Say our file is called 02_data.xml, and we want to link to 01_intro.xml:
In 02_data.xml, this will result in: