By Erik Herzog.
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Additional info for An approach to systems engineering tool data representation and exchange
Extending the scope of STEP to domains not currently covered could cause significant interoperability and harmonisation activities. 11 Alternatives to STEP STEP is not the only framework for information modelling for product data exchange. A number of similar frameworks have been proposed and some have achieved high acceptance levels in industry and academia. The EDIF (Electronic Design Interchange Format)  and CDIF (Case Data Interface Format)  are frameworks defined for data exchange in specific domains.
1 SCHEMATIC HETEROGENEITY Schematic heterogeneity includes attribute name conflicts and schema structure conflicts. Attribute name conflicts include cases where different names are used to capture the same concept in different schemas (synonyms) and the cases where the same name captures different concepts in different schemas (homonyms). Structure conflicts are a result of the same piece of information being captured in different conceptual structures. A concept in one schema may be captured by a set of entity attributes, while being captured by a relationship in another.
An example on a loosely coupled integration architecture is presented in . Selection of integration architecture depends on the characteristics of the constituent databases. A tightly coupled integration approach appears advantageous in cases where the heterogeneity of the component databases is well understood and bounded. Furthermore component schemas 29 C HAPTER 2 must be assumed to be stable over time. On the other hand, a loosely coupled integration solution appears appropriate in cases where component databases are subject to frequent changes, where there is substantial heterogeneity in component schemas and where there exist a limited number of data sources where the data can be retrieved.
An approach to systems engineering tool data representation and exchange by Erik Herzog.