Yes, the plug patterns you mention are correct for the systems used in Europe. I would like to point out that the 230/400V 3-ph system is far more common than the 230V 3-ph. In fact, most countries exclusively use 230/400V, but in a few countries it's probably a good idea to offer the 230V 3-ph as an option.
The IEC 309 connectors are the norm throughout Europe and no other type of connector need to be considered for 3-ph.
For small power demands there are also single phase plugs, both IEC 309 (16-63A) and the general purpose national types (10-16A).
