When defining attributes (DDATTDEF) in these symbols, I have followed the conventions layed out in the table headings below.
TAG PROMPT DEFAULT I C V P TEXT HEIGHT
Tag is the label AutoCAD uses for the attribute, PROMPT is the question asked for each TAG when you insert a block that includes attributes into a drawing, DEFAULT is the value you may set as a default for a TAG, which if not CONSTANT, may be edited at the block insertion stage, or later using the DDATTE command. I, C, V, and P are INVISIBLE, CONSTANT, VERIFY, and PRESET values for each attribute.

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