Integrated Information Support System (IISS). Volume 5. Common Data Model Subsystem. Part 14. Neutral Data Manipulation Language (NDML) Precompiler Transform NDML Request from External Schema to Conceptual Schema Product Specification.

摘要

This specification establishes the design of Function PRE4, Transform ES/CS, one of the major functions of the Configuration Item Precompiler to be built and formally accepted by the ICAM program Office. This CI constitutes one of the subsystems of the Common Data Model Processor (CDMP). The purpose of this Computer Program Configuration Item (CPCI) is to convert an NDML or SQL request, expressed in an external schema, and to terminate one or more NDML or SQL requests expressed in conceptual schema terms. The following functions will be performed by this CPCI: (1) Translate each user view into the corresponding entity classes and each data item into the corresponding attribute use class; (2) Identify the relational join operations needed to construct each user view table; and (3) Identify the integrity tests that will be employed with each NDML or SQL update request.