It indicates if the object has "Component Inheritance". It can be toggled from Options-->Status indicators.
"A variant diagram can include components that are local, inherited, deleted or substituted. If this option is activated, a symbol will indicate object status related to the object described by the diagram. In a diagram, these symbols are displayed under the object."
Note that in standard HOPEX installation a certificate is installed with expiration on 3rd of February 2020. If your installation cease to work, please have your administrator sign-in and download the new certificate. Thank you for your understanding. Download Certificate+