L0 = <http://www.simantics.org/Layer0-1.1>
DATA = <http://www.simantics.org/Datatypes-1.1>

DATA.Log : L0.Entity
  >-- DATA.Log.root --> DATA.Log.IndexNode <R L0.DependsOn : L0.FunctionalRelation
  >-- DATA.Log.t --> L0.Integer <R L0.HasProperty : L0.FunctionalRelation

DATA.Log.Node <T L0.Entity
  >-- DATA.Log.Node.content --> DATA.Log.Content <R L0.HasProperty : L0.FunctionalRelation
  >-- DATA.Log.Node.Contains --> DATA.Log.Node <R L0.IsRelatedTo

DATA.Log.IndexNode <T DATA.Log.Node
DATA.Log.LeafNode <T DATA.Log.Node

DATA.Log.Content <T L0.Literal
   @L0.assert L0.HasDataType ${ size : Integer, stamps : Long[], resources : Long(unit="resource")[] }