Notation	Name	Description	Status
beginning	Beginning	Time stamps indicate the beginning of a period covering the r...	stable
end	End	Time stamps indicate the end of a period covering the range b...	stable
inapplicable	inapplicable	None of the codes in the table are applicable in the context ...	stable
middle	Middle	Time stamps indicate the middle of a period beginning at the ...	stable
unknown	unknown	The beginning and end of the period described by the timestam...	stable