What are "Attributes" in AutoCAD?

Attributes in AutoCAD refer to data associated with blocks that can be filled in with variable text. They serve as a means to add metadata information to block definitions and allow users to insert specific details, such as part numbers, descriptions, or any other variable text pertinent to the block. This information can then be displayed in the drawing and is particularly useful for creating data-rich environments where blocks can be populated with relevant content dynamically.

For instance, when creating a block for a specific item, you might include attributes for the item's name, material, or cost. Each time this block is inserted into a drawing, users can input different values for these attributes, enhancing the functionality and informational value of the drawings.

In contrast, colors associated with layers help in organizing and visually managing the drawings but do not provide variable data linked directly to block definitions. Dimensions set within the drawing deal with measurement and spacing, while objects linked to external references pertain to managing file dependencies rather than the metadata characteristics provided by attributes.