| Concept | Documentation |
| System Of Interest | An abstract element representing a SOI. Base class for specific kinds of SOIs. |
| General Functional Usage | Specifies a General Usage of a General Function within one or more other General Functions. |
| General Context | Specifies a General Context. |
| General Context Element | Specifies a General Context Element. |
| General Context Element Role | Specifies the fact that a General Context Element exists in a given General Context. |
| General Interaction Scenario | Ordered sequence of exchanges of information, energy, or material between General Interaction Scenario Participants. |
| General Scenario Participation | Specifies the fact that a System Role participates in a General Interaction Scenario. |
| General Chronological Message | Ordered sequential occurrence of exchanges between General Interaction Scenario Participants. |
| General Function | Specifies a General Function. It is used as base Class for specific System or Context Functions, or Partial Functions. |
| System | An abstract element representing a System. |
| System Role | Specifies, that a system is part of a system. |
| SMhavingGF | Specifies, that a system has general functions. |
| Interaction Point | Specifies the existence of an interaction point. |
| Interaction Point Definition | Specifies the exchange capabilities of an interaction point on Physical Level. |
| Exchange Kind | Specification for a general kind of item (energy, material, information, etc.) to be exchanged. |
| Interaction Point Property | Specifies a detail of an interaction point. |
| IPDtypingIP | Specifies the fact that an Interaction Point Definition defines the exchange capabilities of an Interaction Point. |
| IPPisDetailOfIPD | Specifies the fact that an Interaction Point Property is a detail of an Interaction Point Definition. |
| EKtypingIPP | Specifies the fact that a Exchange Kind defines the type of a Interaction Point Property. |
| Exchange | Specification for general item exchange (energy, material, information, etc.). |
| EKtypingE | Specifies the fact that a Exchange Kind defines the type of a Exchange. |
| Connection | Specifies the connection of two interaction points. |
| CallowingE | Specifies the fact that a connection allows Exchange to happen |
| SMhavingIP | Specifies the fact that a System has one or more Interaction Points. |
| EEtoSM | Specifies that an exchange goes to a system |
| EEfromSM | Specifies that an exchange comes from a system |