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<!doctype html>
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<li class="toctree-l1 has-children"><a class="reference internal" href="introduction.html">Introduction</a><input class="toctree-checkbox" id="toctree-checkbox-1" name="toctree-checkbox-1" role="switch" type="checkbox"/><label for="toctree-checkbox-1"><div class="visually-hidden">Toggle navigation of Introduction</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="introduction/introduction_to_bim.html">Introduction to BIM</a></li>
<li class="toctree-l2"><a class="reference internal" href="introduction/introduction_to_ifc.html">Introduction to IFC</a></li>
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<li class="toctree-l2"><a class="reference internal" href="ifcopenshell/getting_started.html">Getting Started with IFC parsing</a></li>
<li class="toctree-l2"><a class="reference internal" href="ifcopenshell/geometry_iterator.html">Geometry iterator</a></li>
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<p class="caption" role="heading"><span class="caption-text">Utilities:</span></p>
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<li class="toctree-l1"><a class="reference internal" href="bcf.html">BCF</a></li>
<li class="toctree-l1"><a class="reference internal" href="bimserver-plugin.html">BIMServer-Plugin</a></li>
<li class="toctree-l1"><a class="reference internal" href="bimtester.html">BIMTester</a></li>
<li class="toctree-l1"><a class="reference internal" href="bsdd.html">bSDD</a></li>
<li class="toctree-l1"><a class="reference internal" href="ifc2ca.html">Ifc2CA</a></li>
<li class="toctree-l1"><a class="reference internal" href="ifc4d.html">Ifc4D</a></li>
<li class="toctree-l1"><a class="reference internal" href="ifc5d.html">Ifc5D</a></li>
<li class="toctree-l1"><a class="reference internal" href="ifccityjson.html">IfcCityJSON</a></li>
<li class="toctree-l1"><a class="reference internal" href="ifcclash.html">IfcClash</a></li>
<li class="toctree-l1"><a class="reference internal" href="ifccsv.html">IfcCSV</a></li>
<li class="toctree-l1 current current-page"><a class="current reference internal" href="#">IfcDiff</a></li>
<li class="toctree-l1"><a class="reference internal" href="ifcfm.html">IfcFM</a></li>
<li class="toctree-l1"><a class="reference internal" href="ifcmax.html">IfcMax</a></li>
<li class="toctree-l1"><a class="reference internal" href="ifcpatch.html">IfcPatch</a></li>
<li class="toctree-l1 has-children"><a class="reference internal" href="ifcsverchok.html">IfcSverchok</a><input class="toctree-checkbox" id="toctree-checkbox-5" name="toctree-checkbox-5" role="switch" type="checkbox"/><label for="toctree-checkbox-5"><div class="visually-hidden">Toggle navigation of IfcSverchok</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="ifcsverchok/installation.html">Installation</a></li>
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<li class="toctree-l1"><a class="reference internal" href="ifctester.html">IfcTester</a></li>
<li class="toctree-l1"><a class="reference internal" href="other.html">Other utilities</a></li>
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<p class="caption" role="heading"><span class="caption-text">API:</span></p>
<ul>
<li class="toctree-l1"><a class="reference external" href="https://ifcopenshell.github.io/docs/rst_files/library_root.html">C++ API Reference</a></li>
<li class="toctree-l1 has-children"><a class="reference internal" href="autoapi/index.html">Python API Reference</a><input class="toctree-checkbox" id="toctree-checkbox-6" name="toctree-checkbox-6" role="switch" type="checkbox"/><label for="toctree-checkbox-6"><div class="visually-hidden">Toggle navigation of Python API Reference</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2 has-children"><a class="reference internal" href="autoapi/bcf/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf</span></code></a><input class="toctree-checkbox" id="toctree-checkbox-7" name="toctree-checkbox-7" role="switch" type="checkbox"/><label for="toctree-checkbox-7"><div class="visually-hidden">Toggle navigation of bcf</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l3 has-children"><a class="reference internal" href="autoapi/bcf/v2/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2</span></code></a><input class="toctree-checkbox" id="toctree-checkbox-8" name="toctree-checkbox-8" role="switch" type="checkbox"/><label for="toctree-checkbox-8"><div class="visually-hidden">Toggle navigation of bcf.v2</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l4 has-children"><a class="reference internal" href="autoapi/bcf/v2/model/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2.model</span></code></a><input class="toctree-checkbox" id="toctree-checkbox-9" name="toctree-checkbox-9" role="switch" type="checkbox"/><label for="toctree-checkbox-9"><div class="visually-hidden">Toggle navigation of bcf.v2.model</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v2/model/extensions/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2.model.extensions</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v2/model/markup/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2.model.markup</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v2/model/project/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2.model.project</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v2/model/version/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2.model.version</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v2/model/visinfo/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2.model.visinfo</span></code></a></li>
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<li class="toctree-l4"><a class="reference internal" href="autoapi/bcf/v2/bcfxml/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2.bcfxml</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/bcf/v2/topic/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2.topic</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/bcf/v2/visinfo/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v2.visinfo</span></code></a></li>
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</li>
<li class="toctree-l3 has-children"><a class="reference internal" href="autoapi/bcf/v3/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3</span></code></a><input class="toctree-checkbox" id="toctree-checkbox-10" name="toctree-checkbox-10" role="switch" type="checkbox"/><label for="toctree-checkbox-10"><div class="visually-hidden">Toggle navigation of bcf.v3</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l4 has-children"><a class="reference internal" href="autoapi/bcf/v3/model/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.model</span></code></a><input class="toctree-checkbox" id="toctree-checkbox-11" name="toctree-checkbox-11" role="switch" type="checkbox"/><label for="toctree-checkbox-11"><div class="visually-hidden">Toggle navigation of bcf.v3.model</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v3/model/documents/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.model.documents</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v3/model/extensions/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.model.extensions</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v3/model/markup/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.model.markup</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v3/model/project/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.model.project</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v3/model/version/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.model.version</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/bcf/v3/model/visinfo/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.model.visinfo</span></code></a></li>
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<li class="toctree-l4"><a class="reference internal" href="autoapi/bcf/v3/bcfapi/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.bcfapi</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/bcf/v3/bcfxml/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.bcfxml</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/bcf/v3/document/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.document</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/bcf/v3/topic/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.topic</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/bcf/v3/visinfo/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.v3.visinfo</span></code></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="autoapi/bcf/bcfxml/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.bcfxml</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="autoapi/bcf/extensions/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.extensions</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="autoapi/bcf/geometry/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.geometry</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="autoapi/bcf/inmemory_zipfile/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.inmemory_zipfile</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="autoapi/bcf/xml_parser/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bcf.xml_parser</span></code></a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="autoapi/bsdd/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">bsdd</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="autoapi/test/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">test</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="autoapi/model/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">model</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="autoapi/topic/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">topic</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="autoapi/ifccsv/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifccsv</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="autoapi/visinfo/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">visinfo</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="autoapi/ifcdiff/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcdiff</span></code></a></li>
<li class="toctree-l2 has-children"><a class="reference internal" href="autoapi/ifcpatch/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch</span></code></a><input class="toctree-checkbox" id="toctree-checkbox-12" name="toctree-checkbox-12" role="switch" type="checkbox"/><label for="toctree-checkbox-12"><div class="visually-hidden">Toggle navigation of ifcpatch</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l3 has-children"><a class="reference internal" href="autoapi/ifcpatch/recipes/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes</span></code></a><input class="toctree-checkbox" id="toctree-checkbox-13" name="toctree-checkbox-13" role="switch" type="checkbox"/><label for="toctree-checkbox-13"><div class="visually-hidden">Toggle navigation of ifcpatch.recipes</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/ConvertLengthUnit/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.ConvertLengthUnit</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/ConvertNestToAggregate/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.ConvertNestToAggregate</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/ConvertPropertiesToQuantities/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.ConvertPropertiesToQuantities</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/DowngradeIndexedPolyCurve/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.DowngradeIndexedPolyCurve</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/ExtractElements/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.ExtractElements</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/ExtractPropertiesToSQLite/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.ExtractPropertiesToSQLite</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/FixArchiCADToRevitDoorSwings/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.FixArchiCADToRevitDoorSwings</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/FixArchiCADToRevitSpaces/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.FixArchiCADToRevitSpaces</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/FixRevitClassificationCodeTypes/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.FixRevitClassificationCodeTypes</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/FixRevitTINs/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.FixRevitTINs</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/Ifc2Sql/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.Ifc2Sql</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/MergeDuplicateTypes/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.MergeDuplicateTypes</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/MergeProject/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.MergeProject</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/Migrate/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.Migrate</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/OffsetObjectPlacements/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.OffsetObjectPlacements</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/OffsetStoreyElevations/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.OffsetStoreyElevations</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/Optimise/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.Optimise</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/PurgeData/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.PurgeData</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/RecycleNonRootedElements/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.RecycleNonRootedElements</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/RegenerateGlobalIds/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.RegenerateGlobalIds</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/RemoveRevitUniformatClassification/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.RemoveRevitUniformatClassification</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/RemoveSiteRepresentation/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.RemoveSiteRepresentation</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/ResetAbsoluteCoordinates/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.ResetAbsoluteCoordinates</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/ResetSpatialElementLocations/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.ResetSpatialElementLocations</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/SetFalseOrigin/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.SetFalseOrigin</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="autoapi/ifcpatch/recipes/SetRefElevation/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcpatch.recipes.SetRefElevation</span></code></a></li>
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<li class="toctree-l5"><a class="reference internal" href="autoapi/ifcopenshell/api/owner/remove_address/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcopenshell.api.owner.remove_address</span></code></a></li>
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<li class="toctree-l5"><a class="reference internal" href="autoapi/ifcopenshell/api/owner/remove_person_and_organisation/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcopenshell.api.owner.remove_person_and_organisation</span></code></a></li>
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<li class="toctree-l5"><a class="reference internal" href="autoapi/ifcopenshell/api/resource/edit_resource_time/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcopenshell.api.resource.edit_resource_time</span></code></a></li>
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<li class="toctree-l4 has-children"><a class="reference internal" href="autoapi/ifcopenshell/api/root/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcopenshell.api.root</span></code></a><input class="toctree-checkbox" id="toctree-checkbox-41" name="toctree-checkbox-41" role="switch" type="checkbox"/><label for="toctree-checkbox-41"><div class="visually-hidden">Toggle navigation of ifcopenshell.api.root</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
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<li class="toctree-l4 has-children"><a class="reference internal" href="autoapi/ifcopenshell/api/sequence/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcopenshell.api.sequence</span></code></a><input class="toctree-checkbox" id="toctree-checkbox-42" name="toctree-checkbox-42" role="switch" type="checkbox"/><label for="toctree-checkbox-42"><div class="visually-hidden">Toggle navigation of ifcopenshell.api.sequence</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
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<li class="toctree-l5"><a class="reference internal" href="autoapi/ifcopenshell/api/sequence/assign_sequence/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcopenshell.api.sequence.assign_sequence</span></code></a></li>
<li class="toctree-l5"><a class="reference internal" href="autoapi/ifcopenshell/api/sequence/assign_work_plan/index.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ifcopenshell.api.sequence.assign_work_plan</span></code></a></li>
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<article role="main" id="furo-main-content">
<section id="ifcdiff">
<h1>IfcDiff<a class="headerlink" href="#ifcdiff" title="Link to this heading">¶</a></h1>
<p>IfcDiff is both a CLI utility and library that lets you compare the changes
between two IFC models. Changes are made on the assumption that the GlobalId of
an element in one model is consistent with the same element in another model.
You may compare geometric changes, and changes in various IFC relationships and
properties. IfcDiff supports comparing across different IFC schema versions.</p>
<p>Changes will be sorted into three lists:</p>
<ul class="simple">
<li><p><strong>Added</strong>: a list of GlobalIds of elements present in the new file but not
present in the old file.</p></li>
<li><p><strong>Deleted</strong>: a list of GlobalIds of elements present in the old file but not
present in the new file.</p></li>
<li><p><strong>Changed</strong>: A list of GlobalIds of elements present in both the old and new
file, but changes were detected. A list of changes are provided.</p></li>
</ul>
<p>There are different methods of installation, depending on your situation.</p>
<ol class="arabic simple">
<li><p><strong>PyPI</strong> is recommended for developers using Pip.</p></li>
<li><p><strong>Using Bonsai</strong> is recommended for non-developers wanting a graphical
interface.</p></li>
<li><p><strong>Source installation</strong> is recommended for users wanting to use the latest
code as a library or a CLI utility.</p></li>
</ol>
<section id="pypi">
<h2>PyPI<a class="headerlink" href="#pypi" title="Link to this heading">¶</a></h2>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">pip</span> <span class="n">install</span> <span class="n">ifcdiff</span>
</pre></div>
</div>
</section>
<section id="using-bonsai">
<h2>Using Bonsai<a class="headerlink" href="#using-bonsai" title="Link to this heading">¶</a></h2>
<p>Bonsai is a Blender based graphical interface to IfcOpenShell. Other than
providing a graphical IFC authoring platform, it also comes with IfcOpenShell,
its utilities, and a Python shell built-in. This means you don’t need to
install Python first, and you also can compare your IfcOpenShell scripting to
what you see with a visual model viewer, or use a graphical interface to access
the IfcOpenShell utilities.</p>
<ol class="arabic simple">
<li><p>Install Bonsai by following the <a class="reference external" href="https://docs.bonsaibim.org/quickstart/installation.html">Bonsai
installation documentation</a>.</p></li>
<li><p>Launch Blender. Change to the <strong>Scene Properties</strong> tab in the <strong>Properties
Panel</strong>. Scroll down to the <strong>IFC Quality Control > IFC Diff</strong> panel.</p></li>
<li><p>Browse to your old IFC file, new IFC file.</p></li>
<li><p>Optionally add any relationships you want to check.</p></li>
<li><p>Optionally type in a filter query.</p></li>
<li><p>Press <strong>Execute IFC Diff</strong></p></li>
</ol>
<p>TODO: add pictures and make this clearer for non-developers.</p>
</section>
<section id="source-installation">
<h2>Source installation<a class="headerlink" href="#source-installation" title="Link to this heading">¶</a></h2>
<ol class="arabic simple">
<li><p><a class="reference internal" href="ifcopenshell-python/installation.html"><span class="doc">Install IfcOpenShell</span></a></p></li>
<li><p><a class="reference external" href="https://github.com/IfcOpenShell/IfcOpenShell/tree/v0.8.0/src/ifcdiff">Clone the source code</a>.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">cd</span> <span class="pre">/path/to/IfcOpenShell/src/ifcdiff</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">install</span> <span class="pre">-r</span> <span class="pre">requirements.txt</span></code></p></li>
</ol>
<p>Here is a minimal example of how to use IfcDiff as a Python module or CLI
utility:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>ifcdiff<span class="w"> </span>-h
<span class="go">usage: ifcdiff.py [-h] [-o OUTPUT] [-r RELATIONSHIPS] old new</span>
<span class="go">Show the difference between two IFC files</span>
<span class="go">positional arguments:</span>
<span class="go"> old The old IFC file</span>
<span class="go"> new The new IFC file</span>
<span class="go">options:</span>
<span class="go"> -h, --help show this help message and exit</span>
<span class="go"> -o OUTPUT, --output OUTPUT</span>
<span class="go"> The JSON diff file to output. Defaults to diff.json</span>
<span class="go"> -r RELATIONSHIPS, --relationships RELATIONSHIPS</span>
<span class="go"> A list of space-separated relationships, chosen from "type", "property", "container", "aggregate", "classification"</span>
<span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>ifcdiff<span class="w"> </span>old.ifc<span class="w"> </span>new.ifc
<span class="gp">$ </span>cat<span class="w"> </span>diff.json
</pre></div>
</div>
<p>Here is a minimal example of how to use IfcDiff as a library:</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">ifcdiff</span> <span class="kn">import</span> <span class="n">IfcDiff</span>
<span class="n">ifc_diff</span> <span class="o">=</span> <span class="n">IfcDiff</span><span class="p">(</span><span class="s2">"/path/to/old.ifc"</span><span class="p">,</span> <span class="s2">"/path/to/new.ifc"</span><span class="p">,</span> <span class="s2">"/path/to/diff.json"</span><span class="p">)</span>
<span class="n">ifc_diff</span><span class="o">.</span><span class="n">diff</span><span class="p">()</span>
<span class="nb">print</span><span class="p">(</span><span class="n">ifc_diff</span><span class="o">.</span><span class="n">change_register</span><span class="p">)</span>
<span class="n">ifc_diff</span><span class="o">.</span><span class="n">export</span><span class="p">()</span>
</pre></div>
</div>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<p>For more information on how to use IfcDiff as a library, check out the <a class="reference internal" href="autoapi/ifcdiff/index.html"><span class="doc">API
reference</span></a>.</p>
</div>