Flex Expert System Toolkit

Category Intelligent Software>Expert (Knowledge Based) Systems/Tools

Abstract Flex Expert System Toolkit is an expressive and flexible rule-based development system for building and delivering scalable and flexible expert systems and business rules applications. Flex provides a comprehensive and versatile set of facilities for both programmers and non-programmers to construct reliable and maintainable applications.

Products features/capabilities include:

Hybrid Expert Systems --

Flex is an expressive and advanced expert system toolkit which supports frame-based reasoning with multiple inheritance, rule-based programming and data-driven procedures fully integrated within a logic programming environment. To make these constructs accessible in an intuitive way, Flex contains its own dedicated English-like Knowledge Specification Language (KSL).

Rules, rules and rules --

Flex includes support for different types of rule-based inferencing. The main two (2) are forward-chaining production rules, ideal for data-driven reasoning and backward-chaining rules best suited for goal-based deduction. In addition, Flex is integrated with Flint (see G6G Abstract Number 20186) which offers ways of handling inexact reasoning namely 'Fuzzy Logic', Bayesian Updating and Certainty Factors. This means you can describe your business rules and processes, even when you do Not have a complete functional description.

Delivery options --

Run-time delivery options include: compiling to a self-contained Windows application using the proprietary Logic Programming Associates (LPA) run-time generator. Alternatively, the rule-based component can be embedded within Java or C# or .NET using the LPA Intelligence Server toolkit (an additional advanced product from LPA). In addition, Flex programs can be delivered straight on to the internet using WebFlex (an additional advanced product from LPA).

Knowledge Specification Language --

Flex has its own expressive English-like Knowledge Specification Language (KSL) for defining rules, frames and procedures. The KSL enables developers to write simple and concise statements about the expert's world and produce virtually self-documenting 'knowledge- bases' which can be understood and maintained by non-programmers.

The KSL supports mathematical, Boolean and conditional expressions and functions along with set abstractions; furthermore, the KSL is extendable through synonyms and templates. By supporting both logical and global variables in rules, Flex avoids unnecessary rule duplication and requires fewer rules than most other expert systems.

Integrated Development Tools --

Flex contains a highly interactive development environment with integrated editor, frame browser, debugger, etc. Relationships and the connections between frames can be viewed graphically, and printed for reference. The Flex development environment uses dynamic Rich Syntax Coloring to identify class names, actions, numbers, predicates, etc., in real time during editing and query entry.

Extendibility --

Flex goes beyond most expert system shells in that it employs an open architecture and allows you to access augment and modify its behavior through a layer of access functions. Because of this, Flex is referred to as a toolkit rather than a shell.

The combination of Flex and 'Prolog' [Prolog is a logic programming language. It is a general purpose language often associated with artificial intelligence (AI) and computational linguistics] provides a 'hybrid expert system' toolkit with an advanced general-purpose AI programming language, and results in a functionally rich and versatile development environment where you can fine tune and enhance the built-in control mechanisms to suit your own requirements.

Integration with other Toolkits --

LPA provides a lot of AI toolkits, and with Flex and its Prolog layer, you can use any of them. So, say, if you want to do some data-mining or case-based reasoning, you would simply plug-in the relevant toolkit.

Rule-based Systems --

Rule-based or expert systems allow the scarce and expensive knowledge of experts to be explicitly stored into computer programs and made available to others who may be less experienced. They range in scale from simple rule-based systems with flat data to very large scale, integrated developments taking many person-years to develop.

They typically have a set of 'if-then rules' which forms the knowledge base (KB), and a dedicated inference engine, which provides the execution mechanism. This contrasts to conventional programs where domain knowledge and execution control are closely intertwined such that the knowledge is implicitly stored in the program.

This explicit separation of the knowledge from the control mechanism makes it easier to examine knowledge, incorporate new knowledge and modify existing knowledge.

VisiRule --

The latest product development for Flex is the arrival of VisiRule (see G6G Abstract Number 20187). VisiRule lets you simply draw your rule- based applications as charts using a dedicated graphical tool and generates the executable code for you.

System Requirements


Manufacturer Web Site Flex Expert System Toolkit

Price Contact manufacturer.

G6G Abstract Number 20185

G6G Manufacturer Number 101711