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<h3 class="std">4.10.2 Geometry</h3>

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The shape of products may be represented in multiple ways
 for different purposes. Each representation has a
 well-known string identifier and a particular
 representation context. There may be multiple
 representation contexts to describe a shape at various levels of detail. Most building elements have a 'Body'
 representation which defines or approximates the physical shape and volume. In addition to physical building elements, non-physical elements may have representations
 such as spaces and openings.

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<p>Figure 37 illustrates an instance diagram.</p>
<table><tr><td><img alt="Geometry" src="diagrams/geometry.png" usemap="#f37"><map name="f37"><area shape="rect" coords="8,8,176,248" href="../ifckernel/lexical/ifcproduct.htm" alt="IfcProduct"><area shape="rect" coords="208,8,376,80" href="../ifcrepresentationresource/lexical/ifcproductdefinitionshape.htm" alt="IfcProductDefinitionShape"><area shape="rect" coords="408,8,576,116" href="../ifcrepresentationresource/lexical/ifcshaperepresentation.htm" alt="IfcShapeRepresentation"></map></td></tr><tr><td><p class="figure">Figure 37 &mdash; Geometry</p></td></tr></table>

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