L0 = <http://www.simantics.org/Layer0-1.1>
SIMU = <http://www.simantics.org/Simulation-1.1>

HIS = SIMU.History : L0.Library
    L0.HasResourceClass "org.simantics.simulation.ontology.HistoryResource"

HIS.History <T L0.Entity
    @L0.singleProperty L0.HasName // ID, Typically GUID
    @L0.property L0.ConsistsOf // HIS.History.Item
    >-- HIS.History.size --> L0.Long <R L0.HasProperty : L0.FunctionalRelation
        L0.HasLabel "Total size of all history items in bytes"

// Time series stream
HIS.History.Item <T L0.Entity
    @L0.singleProperty L0.HasName // Identifier
    @L0.singleProperty HIS.History.Item.Series
    @L0.singleProperty HIS.History.Item.Info   
    >-- HIS.History.Item.size --> L0.Long <R L0.HasProperty : L0.FunctionalRelation
        L0.HasLabel "Size of history item in bytes"

// The actual data - time series
HIS.History.Item.Series <R L0.HasProperty : L0.FunctionalRelation
    --> L0.Variant
    
// CollectorState.Item - Collector data for the item
HIS.History.Item.Info <R L0.HasProperty : L0.FunctionalRelation
    --> L0.Variant

// The complete archived+compressed history data
HIS.History.archive <R L0.HasProperty : L0.FunctionalRelation
    --> L0.ByteArray

//
// Below this line -- UNUSED //
//

HIS.History.Item.Format <R L0.HasProperty : L0.FunctionalRelation
    --> L0.DataType

HIS.History.Item.FormatId <R L0.HasProperty : L0.FunctionalRelation
    --> L0.String

HIS.History.Item.VariableId <R L0.HasProperty : L0.FunctionalRelation
    --> L0.String

HIS.History.Item.Deadband <R L0.HasProperty : L0.FunctionalRelation
    --> L0.Double

HIS.History.Item.Interval <R L0.HasProperty : L0.FunctionalRelation
    --> L0.Double

HIS.History.Item.Gain <R L0.HasProperty : L0.FunctionalRelation
    --> L0.Double

HIS.History.Item.Bias <R L0.HasProperty : L0.FunctionalRelation
    --> L0.Double

HIS.History.Item.Enabled <R L0.HasProperty : L0.FunctionalRelation
    --> L0.Boolean

HIS.History.Item.GroupId <R L0.HasProperty : L0.FunctionalRelation
    --> L0.String

HIS.History.Item.GroupItemId <R L0.HasProperty : L0.FunctionalRelation
    --> L0.Variant
    
HIS.History.Item.CollectorState <R L0.HasProperty : L0.FunctionalRelation
    --> L0.Variant