After clicking on the icon a dialog like above will appear.
You can add your own notice to any data sheet. private notice will be visible only for the resp. user, public notice for any user of the ECADATA data base.
You can add source or hints for replacement or any useful hint. Additional you can add a link to other interessing website or files.
After pressing the submit button the notice will be saved and is available in the data sheet.
You also use this function to discuss about usability of replacement types.