Home > User Guide > ACIS Concepts

Model Topology

---

Topology refers to the spatial relationships between the various entities in a model. Topology describes how geometric entities are connected (connectivity). On its own, topology defines a "rubber" model, whose position is not fixed in space. For example, a circular edge and an elliptical edge are topologically equivalent (but not geometrically). Likewise, a square face and a rhomboid face are topologically equivalent (but not geometrically). A topological entity's position is fixed in space when it is associated with a geometric entity.

Refer to the main section of Model Topology for more details.

[Top]

---

© 1989-2007 Spatial Corp., a Dassault Systèmes company. All rights reserved.