GOAL
  ns-prefix rdf = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
  ns-prefix dc  = "http://purl.org/dcelements/1.1"
  ns-prefix cal = "http://www.example.org/Calendar#"
  
  rdf:RDF[
    rdf:Description [
      attributes{rdf:about {"http:/www.example.org/Calendar/calendar.html"}},
        cal:events [
          rdf:Bag [
            all var Events,
        ]
      ]
    ],
    all var Event,
    all var Dates,
  ]

FROM
  Events [
    EventList [var Events],
    Event [var Event],
    Date [var Dates],

  ] 
  
END


CONSTRUCT
  ns-prefix rdf ="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
  ns-prefix dc  ="http://www.w3.org/1999/02/22-rdf-dyntax-ns#"
  ns-prefix cal ="http://www.example.org/Calendar#"
  
  Events[
    EventList [
     rdf:li [attributes{rdf:resources{var Titel}}]
    ],
  
    Event[
      rdf:Description[
        attributes{rdf:about{var Titel}},        
        optional cal:location[var Location], 
      ]
    ],
    
    Date[
      rdf:Description[
        optional attributes{rdf:nodeID{var Date}},
        optional cal:startday[var Start],
        optional cal:starttime[var StartTime],
            
        optional cal:endday[var End],
        optional cal:endtime[var EndTime],
        optional cal:starttimezone[var EndZone],
        optional cal:endtimezone[var StartZone],
      ] 
    ]
  ]
FROM
  in {
    resource ["file:EventinEvent.html","html"],
      html [[
         body {{
           desc /.*/ {{
            attributes {class{"vevent"}},
	
              desc /.*/ {{
                attributes {class{"summary"}},
                var Titel
              }},
              
              without desc /.*/{{
                attributes{class{"vevent"}},            
              }},
              
              optional desc /.*/{{
                attributes{class{"location"}},
                var Location
              }},
              
              optional desc /.*/{{
                attributes{class{"dtstart"}, title{/^(var Start ->[0-9]{4}-?[0-9]{2}-?[0-9]{2})T(var StartTime ->[0-9]{2}:?[0-9]{2}(:?[0-9]{2})?)(var StartZone ->(Z|(-|\.+)[0-9]{2}:[0-9]{2}:[0-9]{2}))/}},
                var Date
              }},
             
              optional desc /.*/{{
                attributes{class{"dtstart"}, title{/^(var Start ->[0-9]{4}-?[0-9]{2}-?[0-9]{2})T(var StartTime ->[0-9]{2}:?[0-9]{2}(:?[0-9]{2})?)/}},
                var Date
              }},            
            
              optional desc/.*/{{
                attributes{class{"dtend"}, title{/^(var End ->[0-9]{4}-?[0-9]{2}-?[0-9]{2})T(var EndTime ->[0-9]{2}:?[0-9]{2}(:?[0-9]{2})?)(var EndZone ->(Z|(-|\.+)[0-9]{2}:[0-9]{2}:[0-9]{2}))/}},
              }},
 
              optional desc/.*/{{
                attributes{class{"dtend"}, title{/^(var End ->[0-9]{4}-?[0-9]{2}-?[0-9]{2})T(var EndTime ->[0-9]{2}:?[0-9]{2}(:?[0-9]{2})?)/}},
              }},
         
          }}
      }}
    ]]
  } 
END