Editing IDEF (section)

=== IDEF1X ===
{{main|IDEF1X}}
[[Image:B 5 1 IDEF1X Diagram.jpg|thumb|left|210px|Example of an [[IDEF1X]] diagram]]

To satisfy the [[data modeling]] enhancement requirements that were identified in the IISS-6202 project, a sub-contractor, [[DACOM]], obtained a license to the [[logical database design technique]] (LDDT) and its supporting software (ADAM). LDDT had been developed in 1982 by Robert G. Brown of The Database Design Group entirely outside the IDEF program and with no knowledge of IDEF1. LDDT combined elements of the relational data model, the E–R model, and generalization in a way specifically intended to support data modeling and the transformation of the data models into database designs. The graphic syntax of LDDT differed from that of IDEF1 and, more importantly, LDDT contained interrelated modeling concepts not present in IDEF1. Mary E. Loomis wrote a concise summary of the syntax and semantics of a substantial subset of LDDT, using terminology compatible with IDEF1 wherever possible. DACOM labeled the result [[IDEF1X]] and supplied it to the ICAM program.<ref>IEEE (1998). ''IEEE Std 1320.2-1998. IEEE Standard for Conceptual Modeling Language Syntax and Semantics for IDEF1X''. New York. p. iii.</ref><ref>Bruce, Thomas A. (1992), Designing Quality Databases with IDEF1X Information Models, {{ISBN|0-932633-18-8}} p=xii</ref>

Because the IDEF program was funded by the government, the techniques are in the [[public domain]]. In addition to the ADAM software, sold by DACOM under the name Leverage, a number of [[Computer-aided software engineering|CASE]] tools use [[IDEF1X]] as their representation technique for data modeling.

The IISS projects actually produced working prototypes of an information processing environment that would run in heterogeneous computing environments. Current advancements in such techniques as [[Java (programming language)|Java]] and [[JDBC]] are now achieving the goals of ubiquity and versatility across computing environments which was first demonstrated by IISS.