ISO 10303-1:1994(E) ©ISO
— application reference models;
— application interpreted models.
Graphical presentations are provided to aid in understanding the definitions presented in each part. Different graphical presentations that are used within ISO 10303 include:
— EXPRESS-G - The graphical representation of EXPRESS as defined in annex D of ISO 10303-11.
— IDEFO - An activity modelling notation [2] used for application activity models within application protocols.
— IDEF1X - The graphical representation used in the IDEF1X information modelling method [3].
— NIAM - The graphical representation used within the NIAM information modelling method [4].
7 Integrated resources
The integrated resources provide resource constructs that are used as the basis of representation of product data. The integrated resources are interpreted to support the information requirements of applications.
Integrated resources provide a unique representation of each element of information within ISO 10303. The meanings of the resource constructs are provided through text definitions.
The integrated resources are divided into logically-related sets of one or more resource constructs. The generic resources are context-independent. The application resources are applicable to specified ranges of applications.
Examples of the two types of integrated resources include:
Generic resources:
- Fundamentals of product description and support (ISO 10303-41);
- Geometric and topological representation (ISO 10303-42);
- Representation structures (ISO 10303-43);
- Product structure configuration (ISO 10303-44);
- Visual presentation (ISO 10303-46);
Application resources:
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©ISO ISO 10303-1:1994(E)
- Draughting (ISO 10303-101);
Generic resource constructs may be interdependent to avoid duplication. Application resource constructs may reference generic resource constructs.
8 Application protocols
8.1 Definition of application requirements
An application protocol (AP) includes the definitions of scope, context, and information requirements of an application. The definitions may specify functions, processes or information that are excluded from the application in order to clarify the scope, context, and information requirements. The statement of scope is supported by an application activity model (AAM) that describes the processes, information flows, and functional requirements of the application. The activity model is included as an informative annex to the AP.
The information requirements and constraints for the application context are defined by means of a set of units of functionality and application objects using application-based terminology. This definition is derived from an application reference model (ARM). An ARM is a formal information model that is documented in an informative annex to the AP.
8.2 Information representation
The resource constructs for representing the information requirements of the application are specified in an application interpreted model (AIM) using the EXPRESS language. The AIM is assembled from resource constructs specified by the integrated resources. The resource constructs are interpreted to meet the application requirements within the defined context and scope of the AP.
A mapping from the information requirements to the AIM is provided. The mapping defines the use within the AIM of resource constructs from the integrated resources to represent the information requirements of the application.
8.3 Implementation methods
The AP is independent of implementation methods. However, an AP may include implementation method specific information in a normative annex. An AP includes a table of short names that the exchange structure implementation method uses to encode AP entity names.
8*4 Conformance requirements
An application protocol includes the conformance requirements to be satisfied by any implementation claiming to support the requirements of the AP. Conformance requirements reflect the
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