| 4.3.4 | Message Push and pro-activeness |
| Above: filter by 'interaction' using Keywords field. Below: filter by 'interaction' using other requirements fields. | |
| 3.3.1 | Multimodal and multi-device delivery of services |
| 4.2.2 | Gathering, Aggregation and Interpretation from Multiple Distributed Context Sources, derivation of knowledge |
| 5.1.1 | Description language allows expression of synchronous and asynchronous interaction |
| 7.3.4 | Changing the Presentation Modality and Interactive Modality |