Abstract: A secure distributed database management query system is disclosed. One or more knowledge stores hold data in the form of statements that represent relationships between nodes in a directed graph data structure. The statements in the database may include security information in the form of statements specifying which users are allowed access at a statement level. A query may include a FROM clause that denotes a multiplicity of knowledge stores that can be queried simultaneously.

Abstract: A database query interface tool for querying a database is disclosed. A search query input section receives a database query from a user. A display section displays a list of items from the database that satisfy the database query and allows a user to select one of the items in the list of items. A display section displays metadata about the selected item and allows selection/deselection of one or more metadatum from the metadata. A display section displays a list of related items in the database that are related to the selected item in accordance with the selected or deselected metadata.