Table 1.

Label description for CMED event and attributes.

Label	Definition	Classes
event	Is a medication change being discussed?	no disposition, disposition, undetermined
action	What is the change being discussed?	start, stop, increase, decrease, other change, unique dose, unknown
negation	Is the change being discussed negated?	negated, not negated
actor	Who initiated the change?	physician, patient, unknown
temporality	When is this change intended to occur?	past, present, future, unknown
certainty	How likely is this change to have occurred/will occur?	certain, hypothetical, conditional, unknown