The ComMentor system can be thought of as a tool which such "trail blazers" use to add value to contents, and which other people use to find guidance based on these human-created super-structures.

ComMentor is a Web-based annotation system developed by the Stanford Integrated Digital Library Project and written in Perl [Röscheisen 1994]. This annotation system is implemented as a Web browser with extensions (based on NSCA Mosaic) that allow the reader to annotate arbitrary Web pages.

ComMentor architecture