Add weights vector to EventHeader and constant for storing them

README.md

@@ -22,21 +22,21 @@ A generic event data model for future HEP collider experiments.
 
 | | | |
 |-|-|-|
-| [EventHeader](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L148) | [MCParticle](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L158) | [SimTrackerHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L227) |
-| [CaloHitContribution](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L261) | [SimCalorimeterHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L273) | [RawCalorimeterHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L285) |
-| [CalorimeterHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L294) | [ParticleID](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L306) | [Cluster](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L319) |
-| [TrackerHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L340) | [TrackerHitPlane](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L357) | [RawTimeSeries](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L378) |
-| [Track](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L391) | [Vertex](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L410) | [ReconstructedParticle](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L427) |
-| [SimPrimaryIonizationCluster](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L531) | [TrackerPulse](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L549) | [RecIonizationCluster](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L562) |
-| [TimeSeries](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L573) | [RecDqdx](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L585) | |
+| [EventHeader](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L148) | [MCParticle](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L160) | [SimTrackerHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L229) |
+| [CaloHitContribution](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L263) | [SimCalorimeterHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L275) | [RawCalorimeterHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L287) |
+| [CalorimeterHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L296) | [ParticleID](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L308) | [Cluster](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L321) |
+| [TrackerHit](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L342) | [TrackerHitPlane](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L359) | [RawTimeSeries](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L380) |
+| [Track](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L393) | [Vertex](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L412) | [ReconstructedParticle](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L429) |
+| [SimPrimaryIonizationCluster](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L533) | [TrackerPulse](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L551) | [RecIonizationCluster](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L564) |
+| [TimeSeries](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L575) | [RecDqdx](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L587) | |
 
 **Associations**
 
 | | | |
 |-|-|-|
-| [MCRecoParticleAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L457) | [MCRecoCaloAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L466) | [MCRecoTrackerAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L475) |
-| [MCRecoTrackerHitPlaneAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L484) | [MCRecoCaloParticleAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L493) | [MCRecoClusterParticleAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L502) |
-| [MCRecoTrackParticleAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L511) | [RecoParticleVertexAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L520) | |
+| [MCRecoParticleAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L459) | [MCRecoCaloAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L468) | [MCRecoTrackerAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L477) |
+| [MCRecoTrackerHitPlaneAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L486) | [MCRecoCaloParticleAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L495) | [MCRecoClusterParticleAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L504) |
+| [MCRecoTrackParticleAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L513) | [RecoParticleVertexAssociation](https://github.com/key4hep/EDM4hep/blob/main/edm4hep.yaml#L522) | |
 
 The tests and examples in the `tests` directory show how to read, write, and use these types in your code.
 

edm4hep.yaml

@@ -153,6 +153,8 @@ datatypes:
  - int32_t runNumber //run number
  - uint64_t timeStamp //time stamp
  - float weight // event weight
+ VectorMembers:
+ - double weights // event weights in case there are multiple. **NOTE that weights[0] might not be the same as weight!** Event weight names should be stored using the edm4hep::EventWeights name in the file level metadata.
 
 
  edm4hep::MCParticle:

include/edm4hep/Constants.h

@@ -22,6 +22,7 @@
 namespace edm4hep {
 static constexpr const char* CellIDEncoding = "CellIDEncoding";
 static constexpr const char* EventHeaderName = "EventHeader";
+static constexpr const char* EventWeights = "EventWeightNames";
 } // namespace edm4hep
 
 #endif // EDM4HEP_CONSTANTS_H