2011

driven constraint A non-parametric dimension enclosed in parentheses that shows the
current value of geometry. The value is updated when the geometry changes size, but it
does not control geometry.
driving dimension A parametric dimension that determines the size of geometry and resizes
the object when its value changes.
driving property A lookup property is considered invertible when a manual change in the
lookup value for a block reference causes other properties values change.
DWG Standard file format for saving vector graphics.
DXF For drawing interchange format. An ASCII or binary file format of a drawing file for
exporting drawings to other applications or for importing drawings from other applications.
dynamic constraint Dimensional constraint (Constraint Form property = "dynamic") that
displays the constraints only when you select the constrained object.
See also: parameter constraint
See also: annotational constraint
dynamic dimension Temporary dimensions that appear on objects, including dynamic
block references, when they are grip edited.
edge The boundary of a face.
edge modifiers Effects such as overhang and jitter that control how edges are displayed in
a shaded model.
elevation The default Z value above or below the XY plane of the current user coordinate
system, which is used for entering coordinates and digitizing locations. (ELEV)
empty selection set A selection set that contains no objects.
environment map A bitmap that is used to simulate reflections in materials that have
reflective properties. The map is “wrapped” around the scene and any reflective object will
show the appropriate portion of the map in the reflective parts of its material.
environment variable A setting stored in the operating system that controls the operation
of a program.
1606 | Chapter 51 Glossary