AutoCAD Attributes

In AutoCAD, an attribute is another way of adding non-graphical information to your drawing. It allows you to attach information to a block, and extract that information into a table or external file to produce a schedule or a bill of materials. Common attribute use is in title blocks. When working with a block that has attribute data attached, you can change its value or the values can be predefined as a constant value. You can also set that information to be invisible.

At first, attributes must be defined, then they must be associated with a block. Attributes are defined using the Attribute Definition dialog (ATTDEF command, or Insert tab – Define Attributes button). There are 3 primary components to an attribute: unique tag (identifies the attribute by name), prompt, and default value (if a variable value is not entered at the prompt).