Definitions for "Data value"
a unit of character or numeric information in a SAS data set. A data value represents one variable in an observation. In the rectangular structure of a SAS data set, intersection of a row and a column.
a single measurement
a single unit of information, such as the square footage for one house
A discrete unit of data within a metadata element, i.e., the data encoded within a tag.
Keywords:  instance, identity, type
an instance of a data type
an instance with no identity