| Class | Description | |
|---|---|---|
 | AccessoryAnnotationNumber | BOM number of accessory. |
| AccessoryInfo | Information about accessory. |
| AlternativePartInfo | Information about alternative part. |
| ApiFilling | Data structure holding information about geometric object's filling. |
| AttachedDocumentInfo | Information about attached document. |
| AutoAttachedPartResult | Result of auto-attach of one part. Returns method EPLAN.Harness.API.Projects.Documents.Designer.AutoPlaceAttachedParts. |
| AutoAttachPartsSettings | Settings for auto-place attached parts command.Settings for auto-place attached parts command. |
| BaseAppearanceInfo | Abstract class for material appearance. |
| BaseLibraryConnection | Abstract class for connection to a library. |
| BaseSqlLibraryConnection | Abstract class for connection to a SQL library. |
| CableLayersPositionData | Class for holding structure and position of cable control points. |
| Connection | Definition of connection between two pins. |
| DecorationItem | An occurrence of the decoration in the drawing. |
| FanPointProperties | Properties of fan point in nailboard. |
| LayerInfo | Layer. |
| LibPart2DViewInfo | Library part"s 2D view. |
| LibPart3DViewInfo | Library part's 3D view. |
| LibPartViewInfo | Library part's view. |
| LibraryPartNumber | Part number of a library part. |
| LinkedPartInfo | Information about linked part. |
| MappedViewsCollection | Read-only collection of mapped views. |
| MappingInfo | Information about mapping of connectable objects and their pins to wires. |
| MasterDataLibraryConnection | Connection to the EPLAN Platform master data library. |
| PartVersion | Part version manipulation class. The version number is stored in "HpD format": Major.mInor.Revision (MM.II.RRRR). The major and minor parts are visible in GUI. The revision part is internal. This number is always incremented when a change of the part is saved in the HpD library. It can cause an inconsistency between part versions in the project and the library. The parts in the project should be updated from the library in this case. |
| PatternSettings | Settings for pattern command. |
| PlacePosition | This class represents a place or position in space. It allows to specify position or occurrence to connect to. |
| RibbonCableBranchInfo | An object representing a branch of a ribbon cable. A branch is a part of ribbon cable between two split control points, between two super pins or between a super pin and split point, such that each non-ending control point on this branch is a plain point (i.e. same number of wires goes in and out). |
| RibbonCableInputBranchInfo | An object containing data about a ribbon cable branch used as input for placing a new ribbon cable |
| SqlLibraryConnection | Connection to the MS SQL server library. |
| TaskInfo | General task. |
| TasksController | Controller of tasks. |
| View | Stored view. |
| ViewsController | Controller of views. |
| XmlLibraryConnection | Connection to the file system-based XML library. |