Most of the content about technical aspects of Information Technology is on the Development site, including information about specific business-rule products, rule engine design, computer languages, etc. Follow one of the the links listed below for more technically oriented content.
Update Oct 29 2008
Interesting article about "A Wen of Rules" from 2003.
Also some Benjamin Grosof links from 2005.
Updated Oct 3 2008:
The representation of knowledge in general, particularly as it applies to the SemWeb.
From the KR.org site:
Principles of Knowledge Representation and Reasoning, Incorporated (KR, Inc.) is a Scientific Foundation incorporated in the state of Massachusetts of the United States of America concerned with fostering research and communication on knowledge representation and reasoning.
From Wikipedia: