Attaching attributes to blocks
You can attach attributes to a after you define it and select it as one of the entities to include. Include the attributes when the program prompts you for the entities to include in the selection set for a block. After the attribute is incorporated into a block, the program prompts you each time you insert the block, so you can specify different values for the attributes each time you insert it into a new drawing.
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Editing attribute definitions
Editing attributes attached to blocks
Extracting attribute information