4 Information requirements

This clause specifies the information requirements for the Structured 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 Structured_mesh_arm;
(*

4.1 Units of functionality

This subclause specifies the units of functionality (UoF) for the Structured 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:

• Structured_mesh.

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

• Mesh;
• Topology.

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

4.1.1 Structured_mesh

The Structured_mesh UoF specifies:

• the definition of a structured mesh in terms of its dimensionality and the number of cells in each direction;
• the definition of a component of a structured mesh that is a sub-volume, surface or edge;
• the definition of a single cell of a structured mesh.

NOTE - A single cell of a structured mesh can be defined by indicating its position within the mesh as a whole. This is the reverse of the process for a structured mesh, in which the cells are defined first.

The following application objects are used by the Structured_mesh UoF:

• Cell_of_structured_mesh;
• Composition_of_structured_mesh;
• Structured_mesh.

4.1.2 Mesh

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

• Composition_of_mesh;
• Mesh.

4.1.3 Topology

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

• Region.

4.2 Required AM ARMs

EXPRESS specification:

*)
USE FROM Mesh_arm -- Mesh
  (Region,
  Composition_of_mesh,
  Mesh);
(*

4.3 ARM type definitions

• none.

4.4 ARM entity definitions

• Cell_of_structured_mesh
• Composition_of_structured_mesh
• Structured_mesh

4.5 ARM rule definitions

• none.

4.6 ARM function definitions

• none.

EXPRESS specification:

*)
END_SCHEMA;
(*