Strategies for Using Information Types in HTML Help
http://www.stc.org/confproceed/1998/PDFs/00172.PDF

Houser, Rob
STC Proceedings
1998

Abstract:

Information types are a new feature of HTML Help, but they are not a new concept to technical communication. Information types are simply categories of information that can be assigned to a discrete piece of information so the information can be displayed or hidden, based on the category selected by the user. The goal of this paper is to get help authors thinking about ways that they can use information types to help their users filter, sort, and understand the structure of the information presented to them through online help.