Design of an extensive information representation scheme for clinical narratives

Table 5 Aspect, assertion, drug-attribute and temporal relations

Aspect	Definition	Involved entities
Continue	Shows the continuation of an event	Aspect → event entities
Decrease	A lowering value (e.g. of dose)
Improve	An improvement (e.g. in condition)
Increase	A rising value (e.g. of dose)
Recurrence_ StartAgain	Indicates that an event begins occurring again
Start	Indicates the initiation of an event
Stop	Indicates the ending of an event
Worsen	A negative change (e.g. in health)
Assertion	Definition	Involved entities
Negation	An event is negated.	Assertion → event entities
Possible	An event may occur.
Presence	An event occurs.
SubjectToCondi- tion	An event may occur on condition that another event occurs
Drug-attribute	Types	Involved entities
	HasAdministrationRoute
	HasDosage	Chemical_Drugs → drug attributes
	HasDrugForm
	HasStrength
Temporal	Definition	Involved entities
Before	An event precedes another event/temporal expression
Begins_on	The event starts on an event or temporal expression	Event entity → Event/Temporal entity
During	The temporal span of an event is completely contained within the span of another event or temporal expression
Ends_on	The event finishes on an event or temporal expression
Overlap	An event happens almost at the same time, but not exactly, as another event/temporal expression
Simultaneous	An event happens at exactly the same time as another event/temporal expression

ISSN: 2041-1480