C3242062_HL7V3.0

**Description:**A kind of observation that allows a Secondary Observation (source act) to assert (at various levels of probability) that the target act of the association (which may be of any type of act) is implicated in the etiology of another observation that is named as the subject of the Secondary Observation

**Example:**Causality assertions where an accident is the cause of a symptom; predisposition assertions where the genetic state plus environmental factors are implicated in the development of a disease; reaction assertions where a substance exposure is associated with a finding of wheezing.