Where used:

Attribute	OBSERVATION DATE	references in description OBSERVATION DATE (BLOOD PRESSURE)
Attribute	OBSERVATION TYPE	references in description OBSERVATION DATE (BLOOD PRESSURE)
Class	BLOOD PRESSURE	references in description OBSERVATION DATE (BLOOD PRESSURE)
Data Element	DATE	references in description OBSERVATION DATE (BLOOD PRESSURE)
Dataset	Summary Core Dataset for Diabetes	references in description OBSERVATION DATE (BLOOD PRESSURE)