4 Information requirements

This clause specifies the information requirements for the Mesh application module.

The information requirements are specified as a set of units of functionality, application elements, and application assertions. These assertions pertain to individual application entities and to relationships between application entities. The information requirements are defined using the terminology of the subject area of this application module.

1. - A graphical representation of the information requirements is given in annex C.
2. - The mapping specification is specified in 5.1 which shows how the information requirements are met using the integrated resources of this International Standard. The use of the integrated resources introduces additional requirements which are common to application modules and application protocols.

EXPRESS specification:

*)
SCHEMA Mesh_arm;
(*

4.1 Units of functionality

This subclause specifies the units of functionality (UoF) for the Mesh application module as well as any support elements needed for the module definition. This part of ISO 10303 specifies the following units of functionality:

• Mesh.
• Physical_space_topology;
• Topology;

This part of ISO 10303 uses the following units of functionality:

• Engineering_analysis_basics;

  NOTE - The Engineering analysis basics AM contains supertypes of the application objects in this AM. These supertypes have no attributes and merely clarify the meaning of the application objects. These supertypes have no impact on the MIM.

The units of functionality and a description of the functions that each UoF supports are given below.

4.1.1 Mesh

The Mesh UoF specifies:

• the fact that a region is divided into cells (i.e. is a mesh);
• a relationship between two meshes that indicates one is part of the other;
• an n+1 dimensional mesh that is defined by a Cartesian product between a n dimensional mesh and a 1 dimensional mesh.

The following application objects are used by the Mesh_relationships UoF:

• Composition_of_mesh;
• Mesh;
• Product_of_mesh.

4.1.2 Physical_space_topology

The Physical_space_topology UoF specifies the relationship between a physical space and a topological object that indicates the physical space has the topology.

The following application objects are used by the Physical_space_topology UoF:

• Physical_space_topology.

4.1.3 Topology

The Topology UoF specifies:

• the existence of a vertex or continuous region;
• the topological dimension and topological shape of a continuous region;
• a relationship that indicates two continuous regions overlap.

The following application objects are used by the Topology UoF:

• Overlapping_regions;
• Region;
• Topological_object;
• Topological_shape;
• Vertex.

4.1.4 Engineering_analysis_basics

This UoF is defined in the Engineering_analysis_basics module. The following application entities from this UoF are referenced in the Mesh module:

• Class;
• Classification;
• Physical_space.

4.2 Required AM ARMs

EXPRESS specification:

*)
USE FROM Engineering_analysis_basics_arm -- Engineering_analysis_basics
  (Class,
  Classification,
  Physical_space);
(*

4.3 ARM type definitions

• none.

4.4 ARM entity definitions

• Composition_of_mesh
• Mesh
• Overlapping_regions
• Physical_space_topology
• Product_of_mesh
• Region
• Topological_object
• Topological_shape
• Vertex

4.5 ARM rule definitions

• none.

4.6 ARM function definitions

• none.

EXPRESS specification:

*)
END_SCHEMA;
(*