Knowledge Explorer is an interactive tool for organizing knowledge.
It helps the user to record, change and search knowledge,
and provides extensive error checking to ensure
the internal consistency of the knowledge.
Interaction with Knowledge Explorer uses simple
English-like statements, commands and questions.

Knowledge is an identification of a fact of reality,
using words and sentences.
The internal knowledge structure consists of concept-hierarchies
and space-time-dependent events.
The principal external knowledge structures are relational databases
and transliterated English.

Principal changes in Knowledge Explorer version 1.6:
revised syntax for phrases (more English-like)
    Phrases (concepts with embedded blanks) do not need
    to be quoted unless they contain commas or semicolons,
    or they occur in attribute=value or action=event lists.
revised syntax for context (moved "at" phrase)
    Context must be at the beginning of a sentence.
