History: What are the properties of an OSC event?

What are the properties of an OSC event?

• The time, an channel, a type, and a value.
  There's only one channel!
• The time, an channel, and a value.
  There's only one channel! And missing type.
• The time, an address, and a type.
  Missing value.
• The time, an address, a type, and a value.
  Very good!