BASE is the Basic Analysis and Security Engine. It is based on the code from the Analysis Console for Intrusion Databases (ACID) project. This application provides a web front-end to query and analyze the alerts coming from a SNORT IDS system.
There are flaws in the BASE code. Some fixes are given here: www.winsnort.com/topic/92-base-fixing-some-of-the-quirks-and-bugs-in-code/ An evolving solution to a problem is here: www.winsnort.com/topic/94-reading-the-events-in-the-winids/