The Tree Identify Protocol of Ieee 1394

We specify the tree identify protocol of a high performance serial multi-media bus (IEEE standard 1394 IEE95]) in three diierent levels of detail using CRL GP95]. We propose using the cones and foci veriication technique of Groote and Springintveld GS95] to show the descriptions equivalent under branching bisimulation. The proof of the equivalence of the two more abstract speciications is shown in detail and the proof of the equivalence of the most abstract and the more complex description, which is work in progress, is sketched.