The IS_ISSUED attribute tells if the drawing is issued. Issuing prevents the recreation of the drawing during drawing update. This attribute can be used for adding Document manager information about issuing in drawing reports. The report returns the value 1 if the drawing is issued, and 0 if it is not issued. Also the Document manager has a column Issue for this information.

In the image below, you can see that some of the drawings have been issued, and there is a flag in the Issue column. One of the issued drawings has changed, which is indicated by the flag