What is the Queries tab for? Is there any documentation available?
The Queries tab is a plug-in included in the general release that can be used to build queries for a knowledge base. Unfortunately, it’s undocumented. The idea is that it works similarly to search screens in various e-mail applications. You look for all instances of a class where a particular slot has (doesn’t have, is equal to, etc.) a particular value. You can combine these statements to either “match all” or “match any” (essentially AND and OR). You can also save a query and use it as an argument to your next query. The newspaper example comes with a few such queries.
