POSC Specifications: Epicentre Version 3.0 Logical Data Model

SHELL (C004, C006)

(Rules) (Express)

An orientable boundary surface of a region. A single region may have more than one shell, as in the case of a solid object with a void contained within it. A region may have no shell only where all space exists as a single region, as in the initial state where no modeling has been done, or after all components of a model have been deleted, or if only faces, rings, edges, vertices have been created. A shell consists of one face or of a connected set of faces which form a closed volume.


Local rules:

Supertype path(s):

Entity consolidated into table SPATIAL_OBJECT.

Referenced in Diagrams:


Generated on Tue Jul 10 15:54:20 2001
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