Label and definition modifications for SEPIO:0000187 Confidence level

[pfabry]

Confidence level is currently defined as: "A data item that quantifies the level of confidence an agent has that a particular piece of information is true." A confidence level quantifying a level of confidence seems circular to us.

Moreover, since confidence level is asserted as a subclass of measurement datum, its definition should read: "A measurement datum that [...]"

Suggested label: confidence level measurement datum This can avoid a confusion with a possible mental entity that would be the confidence level of some agent.