# Dr. Richard H. McCullough

# Knowledge Engineer

## What is Knowledge Explorer?

### McCullough Knowledge Explorer (MKE) 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 MKE uses the MKR language. MKR is a very-high-level knowledge representation language with simple English-like statements, questions and commands, plus UNIX-shell-like variables, methods and control structures.

Learning the MKR language is facilitated by a syntax checker and a menu interface. The syntax checker provides a fast check of input knowledge. The menu interface prompts the user for all necessary information, and automatically generates the correct input syntax.

## What is Knowledge?

### Knowledge is an identification of the facts of reality. Propositional knowledge is knowledge expressed using words and sentences. The principal internal knowledge structures of MKR/MKE are entity-characteristic-proposition hierarchies with space-time-dependent events. The principal external knowledge structures are RDF files and MKR text files (transliterated English, hierarchy outlines, relational databases).

## Semantic Web Applications

### MKR is a general-purpose knowledge representation language which is applicable to any domain. It is ideally suited for Semantic Web applications. MKE "services" include many consistency checks, knowledge base queries, knowledge base statistics, and commands to dynamically modify the instance-class hierarchy. MKE is implemented using the Unicon and KornShell languages, providing easy integration with Unicon procedures, shell scripts, Linux/Windows commands, web pages and standard databases.

The MKR language is more powerful and more user-friendly than the OWL language. MKR extensions include context, questions, commands and n-ary relations. MKE/MKR provides no direct support for RDF model theory semantics -- it uses "natural language semantics" of the real world that we live in, not possible worlds.

MKE provides a user-friendly interface to the Open Directory Project and Stanford TAP knowledge bases. An interface to the OpenCyc knowledge base is under development.

####

## The MKR language

### Do you speak MKR?

### MKR introduction

### MKR theory

### KR-lanugage email group

## The MKE program

### Can you use MKE?

### MKE input menu

### MKE applications

## MKR/MKE documentation

### MKR/MKE tutorial

### MKR grammar

### MKR tokens

### MKR/MKE glossary

### References

## MKE Portable Application Description

## MKE Installation Instructions

## Download Knowledge Explorer 5.8 now
and create your own knowledge base

- MKE for Windows (GNU Open Source) 4 MB
- MKE for Linux (GNU Open Source) 4 MB

## Download Unicon 10.0 if you want to create
your own customized Knowledge Explorer

- Unicon for Windows (Open Source) 8 MB
- Unicon for Linux (Open Source) 4 MB
- Unicon source code (Open Source) 5 MB

## Download other useful utilities if desired

- Parlett XML parser (Public Domain) 575 KB
- Rebol/Core for Linux (Rebol) 180 KB
- Rebol/Core for Windows (Rebol) 175 KB
- UNX commands for Windows (GNU Open Source) 3 MB
- gcc for Windows (GNU Open Source) 9 MB
- CVS for Windows (GNU Open Source) 1.4 MB

- TAP Java client (Open Source) 6 MB
- OpenCyc Java client (Open Source) 40 MB
- Google Java client (Google) 666 KB
- Java2 SDK (Sun) 36 MB
- Jcon for Linux (U. of Arizona) 670 KB

## Recent Improvements

### KE 4.1 new features: new syntax for actions & commands
KE 4.2 new features: file system hierarchies
KE 4.3 new features: use Unicon instead of Icon
KE 4.4 new features: units & primitive concepts
KE 4.5 new features: internet hierarchies; Semantic Web applications
KE 4.6 new features: XML namespace lattice
KE 4.7 new features: semicolon terminates sentence
KE 5.0 new features: KE changed from shareware to open source
KE 5.1 new features: MKR/MKE glossary, MKR introduction
KE 5.2 new features: Parlett XML parser
KE 5.3 new features: new group definition syntax and MKR parser
KE 5.4 new features: namespace stack
KE 5.5 new features: RDF tabula rasa and triples
KE 5.6 new features: Google search and OWL ontology
KE 5.7 new features: redefined views: tabula rasa, rdf, rdfs, owl
KE 5.8 new features: user-defined verbs for binary relations

#### "The Semantic Web in Breadth"
Resource Description Framework (RDF)
Web Ontology Language (OWL)
Open Directory Project
Stanford TAP knowledge base
OpenCyc knowledge base

#### Unicon programming language
Jcon programming language
Icon programming language
Rebol internet messaging language
Sun Java2 programming language
GNU's Not Unix! - Free Software Foundation
Red Hat Linux
UnxUtils UNX commands for Windows (GNU Open Source)
Microsoft SFU UNIX commands for Windows
MKS Toolkit UNIX commands for Windows
Cygwin Linux-like environment for Windows
Personal Ancestral File free genealogy program

#### CNET central
Simtel freeware & shareware for Windows
SourceForge.net Open Source software development website

#### The Objectivist Center
Ayn Rand Institute

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####

Visitors since June 1, 2003 964
Created by the CDepot MakePage Utility on Apr/20/1996.
Last updated by Richard H. McCullough on Jul/23/2003.
Mail suggestions and comments to: rhm@cdepot.net
© Copyright 1996-2003 Richard H. McCullough