| Name | Description |  | 
| CategoryOwnsSubCategories | Relates a parent Category to SubCategory child elements. |  | 
| DefinitionGroupGroupsDefinitions | Relates a DefinitionGroup to its DefinitionElement members. |  | 
| DrawingGraphicRepresentsElement | Relates a DrawingGraphic to the Element that it represents |  | 
| ElementDrivesElement | A Relationship indicating that one Element drives another Element. |  | 
| ElementEncapsulatesElements | Relates a parent Element to child Elements which represent hidden parts of the Entity. |  | 
| ElementGroupsMembers | An ElementRefersToElements relationship where one Element groups a set of other Elements. |  | 
| ElementOwnsChildElements | Relates a parent Element to child Elements which represent parts of the Entity modeled by the parent Element. |  | 
| ElementOwnsExternalSourceAspects | Relates an Element and an ExternalSourceAspect that it owns. |  | 
| ElementOwnsMultiAspects | Relates an Element and an ElementMultiAspect that it owns. |  | 
| ElementOwnsUniqueAspect | Relates an Element and an ElementUniqueAspect that it owns. |  | 
| ElementRefersToElements | A Relationship where one Element refers to another Element |  | 
| ExternalSourceAttachmentAttachesSource | Relates an ExternalSource to the RepositoryLink that it is persisted in. |  | 
| ExternalSourceGroupGroupsSources | Relates an ExternalSourceGroup to its ExternalSource members. |  | 
| ExternalSourceIsInRepository | Relates an ExternalSource to the RepositoryLink that it is persisted in. |  | 
| ExternalSourceOwnsAttachments | Relates a parent ExternalSource to its ExternalSourceAttachment children. |  | 
| FolderContainsRepositories | Relates a parent FolderLink to its RepositoryLink children. |  | 
| GeometricElement2dHasTypeDefinition | Relates a GeometricElement2d to its TypeDefinitionElement |  | 
| GeometricElement3dHasTypeDefinition | Relates a GeometricElement3d to its TypeDefinitionElement |  | 
| GraphicalElement2dIsOfType | Relates a GraphicalElement2d to its GraphicalType2d |  | 
| GraphicalElement3dRepresentsElement | Relates a GraphicalElement3d to the Element that it represents |  | 
| GroupImpartsToMembers | Represents group membership where the group Element (and its properties) impart information about the member Elements above mere membership. |  | 
| PhysicalElementAssemblesElements | Relates a parent PhysicalElement to PhysicalElement children that it assembles. |  | 
| PhysicalElementIsOfPhysicalMaterial | Relates a PhysicalElement to its PhysicalMaterial |  | 
| PhysicalElementIsOfType | Relates a PhysicalElement to its PhysicalType |  | 
| PhysicalTypeIsOfPhysicalMaterial | Relates a PhysicalType to its PhysicalMaterial |  | 
| Relationship | Base class for all link table ECRelationships |  | 
| Relationships | Manages Relationships. |  | 
| RenderMaterialOwnsRenderMaterials | Relates a parent RenderMaterial to RenderMaterial child elements. |  | 
| SheetIndexFolderOwnsEntries | Relates a SheetIndexFolder to the SheetIndexEntry's that it contains. |  | 
| SheetIndexOwnsEntries | Relates a SheetIndex to the [SheetIndexEntry]]'s that it contains. |  | 
| SheetIndexReferenceRefersToSheetIndex | Relates a SheetIndexReference to a SheetIndex it refers. |  | 
| SheetReferenceRefersToSheet | Relates a SheetReference and Sheet that it refers. |  | 
| SpatialLocationIsOfType | Relates a SpatialLocationElement to its SpatialLocationType |  | 
| SubjectOwnsPartitionElements | Relates a parent Subject to InformationPartitionElement child elements. |  | 
| SubjectOwnsSubjects | Relates a parent Subject to Subject child elements. |  | 
| SynchronizationConfigProcessesSources | Relates a SynchronizationConfigLink to N ExternalSource instances. |  | 
| SynchronizationConfigSpecifiesRootSources | Relates a SynchronizationConfigLink to root ExternalSource instances. |  |