AutoCAD 2008 User's
Guide > Create and Modify
Objects > Create and Use
Blocks (Symbols) > Attach Data to
Blocks (Block Attributes) > Extract Block
Attribute Data (Advanced) >
Extract Block Attribute Data (Advanced)
Extracts attribute data, informational text associated with a block, into a file
Extracts and exports object property data from drawings and merges data from an external source to a data extraction table or external file
