Audience
                
                
                    ?
                        For whom is the resource suitable? Teachers? Learners? Experts?
                    
                     (optional) 
                
 
                
                InteractivityType
                
                    
                
                    ?
                        Does the resource expose content, activate the learners or both?
                    
                     (optional) 
                
 
                
                Keyword(s)
                
                
                    ?
                        The keyword(s) associated with the resource (not necessarily bound to a standard vocabulary).
Use the comma (,) as separator!
                    
                     (optional) 
                
 
                
                Contributor
                
                
                    ?
                        The name of a contributor (if applicable).
Klick the 'plus' sign for additional fields (max. 2).
                    
                     (optional) 
                    
 ➕
                 
                
                Reference  (URL) 
                
                
                    ?
                        The URL of the resource this resource is based on (e.g. https://www.merlot.org/merlot/viewMaterial.htm?id=773401860).
                    
                     (optional) 
                
 
                Creation Date
                
                
                    ?
                        The date the resource has been created (format: yyyy-mm-dd).
                    
                     (optional) 
                
 
                
                Modification Date
                
                
                    ?
                        The date of the last modification of the resource (format: yyyy-mm-dd).
                    
                     (optional)