[Question] How do you represent that a tombstone was destroyed?

[muninn]

[Question] How do you represent that a tombstone was destroyed?

[rwarren2]

This is because of an annoying corner case: some people want to record events that occur on monuments and others just want to records monuments as they are. A typical example is the ShipWrecks vs the Ships or Hulls: it's the same things but it's status has changed along with its position. The other is the reinterment of remains as with the Canadian War Memorial example with currently uses the movedFrom instance (See #32).

To solve your immediate problem, if you just want to say the Tombstone only existed from 1861 to 1870.

  <graves:Tombstone rdf:about="#TheSpecificTombstone">
   <graves:inscription>A Canadian Soldier of the Great War</graves:inscription>
   <graves:epitaph>Known unto God</graves:epitaph>
   <prov:startedAtTime rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">1861</prov:startedAtTime>
   <prov:endedAtTime rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">1870</prov:endedAtTime>
  <graves:hasStatus rdf:resources="https://rdf.muninn-project.org/ontologies/graves#Serviceable"/>
  </graves:Tombstone> 

if the Tombstone was only ruined and not destroyed in 1807:

  <graves:Tombstone rdf:about="#TheSpecificTombstoneRuined">
   <time:after rdf:resource=""/>
   <graves:inscription>A Canadian Soldier of the Great War</graves:inscription>
   <graves:epitaph>Known unto God</graves:epitaph>
   <prov:startedAtTime rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">1870</prov:startedAtTime>
  <graves:hasStatus rdf:resources="https://rdf.muninn-project.org/ontologies/graves#Ruins"/>
  </graves:Tombstone> 

If you'd like to add a specific event that leads to its demise:

 <prov:Activity rdf:about="...">
  <time:after rdf:resource="#TheSpecificTombstone"/>
  <time:before rdf:resource="#TheSpecificTombstoneRuined"/>
  <rdfs:label xml:lang="en">Tombstone destroyed by vandals in 1870</rdfs:label>
  <prov:startedAtTime rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">1870</prov:startedAtTime>
  <prov:endedAtTime rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">1870</prov:endedAtTime>
 <prov:Activity>

Please ignore next_instance and previous_instances from now on.