Term: a word or phrase used to describe a thing or to express a concept [1]
Concept: an abstract idea. Concepts are expressed by terms. [1]
Fact: Facts relate terms [2]
Fact Type: a fact type is an association between two or more concepts
Vocabulary: the body of words used in a particular language or in a particular sphere [1]
Terminology: the body of terms used in a subject of study, profession, etc. [1]
Fact Model: A fact model establishes the basis for shared operational business knowledge. [2] This model is usually graphical and can also be called the business object model or BOM.
RuleXpress is a repository-based tool that can be used offline or in a multi-user environment. Models are stored in a central repository and can be checked out to a local copy and then merged back. Within the tool the key organizing principle is that of a community - a group of people who share the same understanding about their vocabulary and rules. Within this you can have projects but the focus of the tool is on the activity of vocabulary/rule management as an ongoing task. The key activities are to manage vocabulary and rules or, more specifically terms, fact model, rules, decision tables and rule groups.