scope:

This document specifies a mapping of EXPRESS (ISO 10303-11) constructs to SysML constructs for the purpose of representing EXPRESS schemas in SysML models. The specified mapping is a one-way transformation from an EXPRESS schema to a SysML information model.

The following are within the scope of this document:

- the specification of the transformation of EXPRESS constructs to SysML constructs represented in CXMI;

- the specification of the transformation of EXPRESS UNIQUE rules to SysML constructs represented in CXMI;

- the specification of the transformation of derived attributes to implement renaming to SysML constructs represented in CXMI.

The following are outside the scope of this document:

- the transformation of EXPRESS elements into SysML metamodel constructs that are not used in the STEP Extended Architecture^[9][10][11];

- transformation of EXPRESS FUNCTIONS;

- transformation of EXPRESS-G to SysML diagrams;

- tools, codes, and scripts to transform an EXPRESS schema to SysML CXMI;

- transformation of EXPRESS interface specification;

- SysML constraints transformation from EXPRESS DERIVE attributes, except the ones used for renaming;

- SysML constraints transformation from EXPRESS SUPERTYPE expressions;

- SysML constraints transformation from EXPRESS GLOBAL rules;

- SysML constraints transformation from EXPRESS WHERE rules.

NOTE EXPRESS DERIVE attributes, EXPRESS SUPERTYPE expressions, EXPRESS GLOBAL rules and EXPRESS WHERE rules are transformed into OCL^[2] specifications. OCL specifications are integrated in the SysML model based on a separate process.