| ChxCommand | Motor command data |
| ChxRobotInfo | Robot information |
| ChxsColor | A 4-tuple representing a color in RGBA space |
| ChxsContactPoint | Information about a contact point |
| ChxsContactPoints | Information about contacts |
| ChxSensor | Sensor data |
| ChxsJoint | Information about a joint. A joint is a component of a model |
| ChxsLink | Information about a link. A link is a component of a model |
| ChxsModel | Information about a model |
| ChxsQuaternion | A quaternion |
| ChxsSimInfo | Simulation information |
| ChxsTransform | A translation and orientation constructed of a hxVector3 and hxQuaternion |
| ChxsVector3 | A three-tuple vector |
| ChxsWrench | |
| ChxTime | A representation of time |