Annex C
(informative)
Hierarchical diagrams for SRM concepts
C.1 Introduction
This annex presents diagrams that illustrate SRM concepts and their relationships. Figure C.1 illustrates the relationships among many of the key SRM concepts as a UML class diagram. Hierarchical diagrams Figure C.2, Figure C.3, and Figure C.4 illustrate the relationships between RDs, RD categories, ORMs and ORM templates. These concepts are applicable to spatial objects of 2 and 3 dimensions. For simplicity of presentation, this informative annex only presents the 3D case. Figure C.2 illustrates the relationship between reference datum categories and (a subset of) the standardized RDs. Figure C.3 shows the relationship between ORM templates and RD components. Three examples of ORMs based on an ORM template are shown in Figure C.4.
C.2 Hierarchical diagrams
Figure C.1 — SRM concepts and their relationships
In Figure C.1 shaded
concepts are those that appear in the SRM API (Clause 11), and also as registerable items
(Clause 12). The aggregation
relationships involving Coordinate-Space, Position-Space, and Object-Space are
intended only to show that the component objects (Coordinate, Position, etc.)
are defined within the respective spaces. A multiplicity of “*” is intended to
indicate that there are potentially an infinite number of such objects within
the space.
Figure C.3 — 3D ORMT components
