IEEE 1320.2-1998 pdf download IEEE Standard for Conceptual Modeling Language Syntax and Semantics for IDEF1X 97 (IDEF object
For example, the sentence “The chair sings the treeis grammatically sound in English; there is a subject, averb. and an obiect in the sentence. However. the sentence itself is not useful because it states something thatis nonsensical. In a natural language, rules must be established that, for instance, indicate that the subject ofthe sentence must be capable of taking action, if the verb is an action, and of taking the particular actionspecified by the verb.
Such a guide to the interpretation and use of the enterprise knowledge is, itself, captured as a set of facts.This body of facts about facts, or metaknowledge, in turn needs a guide to its understanding and use. Thisgoal, in a nutshell, is the scope of IDEF1X. As part of its semantics and syntax, IDEF1X establishes justwhat can be said about the enterprise knowledge and what sorts of conclusions can be drawn from that meta-knowledge.
This standard does not treat methodology. A methodology is an ordered process used to produce a repeatableresult. An IDEFIX methodology deals with the process of creating a model using the IDEFIX language.While critical to the practitioner, such considerations are beyond the scope of this standard. Rather, theIDEFIX constructs will be presented individually, without regard for their logical sequence of use.
1.2 Purpose
This purpose of this standard is to describe the IDEF1X language in an unambiguous manner and therebymeet two important needs. First, those who develop and use IDEF1X models need a common understandingof the modeling constructs and rules. A precise definition of the meaning of the language components allowsa model developed by one individual or group to be understood by another Second, IDEF1X users must besupported in practice by automated tools that record and validate the models. Tool developers need a precisedefinition of the language so that their products assist users in applying the language correctly and allowexchange of models, at the semantic level, with other tools.
The purpose of IDEF1X as a modeling technique is the same as that of all modeling techniques employed insystem analysis and development efforts, that is, to plan, build, or use systems and information systems inparticular, it helps to understand the meaning of the concepts involved. Modeling provides a “language formeanings and is sometimes referred to as closing the semantic gap between the concepts of the enterpriseand the capabilities of the computer systems. Figure I summarizes the fundamental purpose of a model: toenable accurate and useful communication among users. analysts. and developers as they all reason aboutthe same thing.
IEEE 1320.2-1998 pdf download
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