A property does not exist
The document under test is a part, assembly or drawing. 
Performs the operation if a property does not exist in the document.
Example: If the " Description" property does not exist in the document, then the operation is applied.
You can use the "*" character before or after a specific string to check whether the document contains that string.
Example:
Pro* If a property beginning with "Pro"does not exist in the document, then the operation is applied.
*000: If a property ending in 000 does not exist in the document, then the operation is applied.
You can also set multiple properties by separating them with the ''; '' character.
Example:
Item_Code; Processing;Supplier
If none of the properties Code_Article, Processing,or Supplier exist in the document, then the operation is applied.