What it is

<LINK> tags allow you to convey meta-information about the relationship of documents on the web; both site-wide relationships such as Search, Help, Copyright, and Author, and page-specific navigational relationships as Up, First, Previous, Next, Last. Advanced browsers will make intelligent use of that information, for example with a discreet but efficient navigation bar or by speculatively loading the Next page.

The NavLink.pl script automatically generates both types of link tags and inserts them appropriately into the HTML files, allowing you to easily maintain a correspondence between the <LINK> tags and the navigational structure of your site.

The script is freely available under the GPL.  You may download it and then peruse instructions for use.