D | SAS.GRAPH 9.1 Reference, Volumes I and II

data area: the portion of the graphics output area in which data values are displayed. In the Annotate facility, the data area defines a coordinate system. In plots and bar charts , the data area is bounded by axes; in choropleth maps, the data area is bounded by the edge of the unit areas. See also graphics output area, procedure output area, and coordinate system.
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.
date value: See SAS date value.
default: (1) The setting of a value, parameter, or argument used by the SAS System if the user does not specify a setting.

(2) the value, parameter, or option setting used by the SAS System if the user specifies no particular setting.
density value: a value assigned to each observation in a map data set reflecting the amount of detail (resolution) contributed by the observation.
dependent variable: a variable whose value is determined by the value of another variable or set of variables .
device driver: a routine that generates the specific machine-language commands needed to display graphics output on a particular device. SAS/GRAPH device drivers take device-independent graphics information produced by SAS/GRAPH procedures and create the commands required to produce the graph on the particular device.
device entry: a SAS catalog entry that stores the values of device parameters (or the characteristics) that are used with a particular output device.
device map: a catalog entry used to convert the SAS/GRAPH internal encoding for one or more characters to the device-specific encoding needed to display the character(s) in hardware text on a particular graphics output device. See also hardware character set.
device parameter: a value in a device entry that defines a default behavior or characteristic of a device driver. Some device parameters can be overridden by graphics options. See also graphics option.
display: the area of the monitor that displays what the software presents to you.
display manager: See SAS Display Manager System.