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<h4 class="std">4.6.1.2 Spatial Decomposition</h4>
<p>Provision of a spatial structure of the project by aggregating spatial structure elements. The spatial structure is a hierarchical tree of spatial structure elements (site, building, storey, space) ultimately assigned to the project. Decomposition refers to the relationship to lower level elements (e.g. this storey has spaces).</p>
<p>The order of spatial structure elements being included in the concept are from high to low level: <a href="../ifckernel/lexical/ifcproject.htm">IfcProject</a>, <a href="../ifcproductextension/lexical/ifcsite.htm">IfcSite</a>, <a href="../ifcproductextension/lexical/ifcbuilding.htm">IfcBuilding</a>, <a href="../ifcproductextension/lexical/ifcbuildingstorey.htm">IfcBuildingStorey</a>, <i>fcSpace</i>. Therefore an spatial structure element can only has parts of an element at the same or lower level.</p><p>Figure 24 illustrates an instance diagram.</p>
<table><tr><td><img alt="Spatial Decomposition" src="diagrams/spatial-decomposition.png" usemap="#f24"><map name="f24"><area shape="rect" coords="8,8,176,152" href="../ifckernel/lexical/ifcobjectdefinition.htm" alt="IfcObjectDefinition"><area shape="rect" coords="208,8,376,92" href="../ifckernel/lexical/ifcrelaggregates.htm" alt="IfcRelAggregates"><area shape="rect" coords="408,8,576,296" href="../ifcproductextension/lexical/ifcspatialelement.htm" alt="IfcSpatialElement"></map></td></tr><tr><td><p class="figure">Figure 24 &mdash; Spatial Decomposition</p></td></tr></table>

<hr>
<h4>Electrical System Design</h4>
<p>This concept is used by entities for exchanges as shown.</p>
<table class="exchange">
<tr><td></td><td><a href="../views/electrical-system-design/facility-criteria.htm"><image width="16" src="../../img/mvd-facility-criteria.png" title="Facility Criteria"></image></a></td>
<td><a href="../views/electrical-system-design/discipline-specifications.htm"><image width="16" src="../../img/mvd-discipline-specifications.png" title="Discipline Specifications"></image></a></td>
<td><a href="../views/electrical-system-design/project-definition.htm"><image width="16" src="../../img/mvd-project-definition.png" title="Project Definition"></image></a></td>
<td><a href="../views/electrical-system-design/space-program.htm"><image width="16" src="../../img/mvd-space-program.png" title="Space Program"></image></a></td>
<td><a href="../views/electrical-system-design/product-program.htm"><image width="16" src="../../img/mvd-product-program.png" title="Product Program"></image></a></td>
<td><a href="../views/electrical-system-design/design-early.htm"><image width="16" src="../../img/mvd-design-early.png" title="Design Early"></image></a></td>
<td><a href="../views/electrical-system-design/system-layout.htm"><image width="16" src="../../img/mvd-system-layout.png" title="System Layout"></image></a></td>
<td><a href="../views/electrical-system-design/design-schematic.htm"><image width="16" src="../../img/mvd-design-schematic.png" title="Design Schematic"></image></a></td>
<td><a href="../views/electrical-system-design/product-type-template.htm"><image width="16" src="../../img/mvd-product-type-template.png" title="Product Type Template"></image></a></td>
<td><a href="../views/electrical-system-design/product-template.htm"><image width="16" src="../../img/mvd-product-template.png" title="Product Template"></image></a></td>
<td><a href="../views/electrical-system-design/product-type-selection.htm"><image width="16" src="../../img/mvd-product-type-selection.png" title="Product Type Selection"></image></a></td>
<td><a href="../views/electrical-system-design/system-operation.htm"><image width="16" src="../../img/mvd-system-operation.png" title="System Operation"></image></a></td>
<td><a href="../views/electrical-system-design/design-coordinated.htm"><image width="16" src="../../img/mvd-design-coordinated.png" title="Design Coordinated"></image></a></td>
</tr><tr><td><a href="../ifcproductextension/lexical/ifcbuilding.htm">IfcBuilding</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifcproductextension/lexical/ifcbuildingstorey.htm">IfcBuildingStorey</a></td><td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>-<br>-</td>
</tr>
<tr><td><a href="../ifckernel/lexical/ifcproject.htm">IfcProject</a></td><td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
</tr>
<tr><td><a href="../ifcproductextension/lexical/ifcsite.htm">IfcSite</a></td><td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>-<br>-</td>
<td>-<br>-</td>
<td>R<br>R</td>
<td>R<br>R</td>
<td>R<br>R</td>
</tr>
</table>
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