| Name | Kind | Description |
| datasrc | relation | The predecessor in a processing pipeline, i.e. a source to get data to be processed |
| define segment | opaque activity action | |
| descriptor | relation | type of this frame |
| descriptor | relation | |
| design | package | |
| design | package | All things concering the big picture. Not a real code package, rather a container for design drafts, specifications, decisions. |
| determine Render Params | expansion region | |
| determine Render Params | opaque activity action | |
| devnull | class instance | |
| DirectPlacement | class | |
| Dispatcher | component |