Off-On Sequence
Simple Off/On switches can become quite complex when additional contacts are required for performing auxiliary functions. So if you should ever require say a 9-pole rotary switch with 3 N/O and 4 N/C contacts, one of each being gold plated, then the Off-On Sequence is the only logical solution.
This website shows a selection of standard Off-On Sequence formats, but if your requirement is somewhat different, then please give our technical sales a call, and they will be pleased to discuss your individual requirements.