Class: MktTerminal
Subclass of IEC61970:Core:Terminal.
URI: cim:MktTerminal
classDiagram
class MktTerminal
Terminal <|-- MktTerminal
MktTerminal : alias_name
MktTerminal : auxiliary_equipment
MktTerminal --> AuxiliaryEquipment : auxiliary_equipment
MktTerminal : branch_group_terminal
MktTerminal --> BranchGroupTerminal : branch_group_terminal
MktTerminal : bus_name_marker
MktTerminal --> BusNameMarker : bus_name_marker
MktTerminal : bushing
MktTerminal --> Bushing : bushing
MktTerminal : circuit
MktTerminal --> Circuit : circuit
MktTerminal : conducting_equipment
MktTerminal --> ConductingEquipment : conducting_equipment
MktTerminal : connected
MktTerminal : connectivity_node
MktTerminal --> ConnectivityNode : connectivity_node
MktTerminal : converter_dcsides
MktTerminal --> ACDCConverter : converter_dcsides
MktTerminal : description
MktTerminal : diagram_objects
MktTerminal --> DiagramObject : diagram_objects
MktTerminal : equipment_faults
MktTerminal --> EquipmentFault : equipment_faults
MktTerminal : flowgate
MktTerminal --> Flowgate : flowgate
MktTerminal : has_first_mutual_coupling
MktTerminal --> MutualCoupling : has_first_mutual_coupling
MktTerminal : has_second_mutual_coupling
MktTerminal --> MutualCoupling : has_second_mutual_coupling
MktTerminal : instance_set
MktTerminal --> InstanceSet : instance_set
MktTerminal : m_rid
MktTerminal : measurements
MktTerminal --> Measurement : measurements
MktTerminal : names
MktTerminal --> Name : names
MktTerminal : normal_head_feeder
MktTerminal --> Feeder : normal_head_feeder
MktTerminal : operational_limit_set
MktTerminal --> OperationalLimitSet : operational_limit_set
MktTerminal : phases
MktTerminal --> PhaseCode : phases
MktTerminal : pin_terminal
MktTerminal --> PinTerminal : pin_terminal
MktTerminal : properties_cimdata_object
MktTerminal --> ChangeSetMember : properties_cimdata_object
MktTerminal : regulating_control
MktTerminal --> RegulatingControl : regulating_control
MktTerminal : remote_input_signal
MktTerminal --> RemoteInputSignal : remote_input_signal
MktTerminal : sequence_number
MktTerminal : sv_power_flow
MktTerminal --> SvPowerFlow : sv_power_flow
MktTerminal : targeting_cimdata_object
MktTerminal --> ChangeSetMember : targeting_cimdata_object
MktTerminal : terminal_constraint_term
MktTerminal --> TerminalConstraintTerm : terminal_constraint_term
MktTerminal : tie_flow
MktTerminal --> TieFlow : tie_flow
MktTerminal : topological_node
MktTerminal --> TopologicalNode : topological_node
MktTerminal : transformer_end
MktTerminal --> TransformerEnd : transformer_end
Inheritance
- IdentifiedObject
- ACDCTerminal
- Terminal
- MktTerminal
- Terminal
- ACDCTerminal
Slots
| Name | Cardinality and Range | Description | Inheritance |
|---|---|---|---|
| flowgate | 0..1 Flowgate |
direct | |
| terminal_constraint_term | 0..* TerminalConstraintTerm |
direct | |
| phases | 0..1 PhaseCode |
Represents the normal network phasing condition | Terminal |
| topological_node | 0..1 TopologicalNode |
The topological node associated with the terminal | Terminal |
| connectivity_node | 0..1 ConnectivityNode |
The connectivity node to which this terminal connects with zero impedance | Terminal |
| conducting_equipment | 1..1 ConductingEquipment |
The conducting equipment of the terminal | Terminal |
| regulating_control | 0..* RegulatingControl |
The controls regulating this terminal | Terminal |
| has_first_mutual_coupling | 0..* MutualCoupling |
Mutual couplings associated with the branch as the first branch | Terminal |
| transformer_end | 0..* TransformerEnd |
All transformer ends connected at this terminal | Terminal |
| branch_group_terminal | 0..* BranchGroupTerminal |
The directed branch group terminals for which this terminal is monitored | Terminal |
| sv_power_flow | 0..* SvPowerFlow |
The power flow state variable associated with the terminal | Terminal |
| auxiliary_equipment | 0..* AuxiliaryEquipment |
The auxiliary equipment connected to the terminal | Terminal |
| has_second_mutual_coupling | 0..* MutualCoupling |
Mutual couplings with the branch associated as the first branch | Terminal |
| tie_flow | 0..* TieFlow |
The control area tie flows to which this terminal associates | Terminal |
| equipment_faults | 0..* EquipmentFault |
The equipment faults at this terminal | Terminal |
| converter_dcsides | 0..* ACDCConverter |
All converters' DC sides linked to this point of common coupling terminal | Terminal |
| pin_terminal | 0..* PinTerminal |
Terminal | |
| normal_head_feeder | 0..1 Feeder |
The feeder that this terminal normally feeds | Terminal |
| circuit | 0..1 Circuit |
Terminal | |
| remote_input_signal | 0..* RemoteInputSignal |
Input signal coming from this terminal | Terminal |
| bushing | 0..1 Bushing |
Terminal | |
| connected | 0..1 Boolean |
The connected status is related to a bus-branch model and the topological nod... | ACDCTerminal |
| sequence_number | 0..1 Integer |
The orientation of the terminal connections for a multiple terminal conductin... | ACDCTerminal |
| bus_name_marker | 0..1 BusNameMarker |
The bus name marker used to name the bus (topological node) | ACDCTerminal |
| operational_limit_set | 0..* OperationalLimitSet |
The operational limit sets at the terminal | ACDCTerminal |
| measurements | 0..* Measurement |
Measurements associated with this terminal defining where the measurement is... | ACDCTerminal |
| alias_name | 0..1 String |
The aliasName is free text human readable name of the object alternative to I... | IdentifiedObject |
| description | 0..1 String |
The description is a free human readable text describing or naming the object | IdentifiedObject |
| m_rid | 0..1 String |
Master resource identifier issued by a model authority | IdentifiedObject |
| diagram_objects | 0..* DiagramObject |
The diagram objects that are associated with the domain object | IdentifiedObject |
| instance_set | 1..1 InstanceSet |
Dataset containing the data objects | IdentifiedObject |
| names | 0..* Name |
All names of this identified object | IdentifiedObject |
| properties_cimdata_object | 0..1 ChangeSetMember |
The single CIM data object in the appropriate dataset context | IdentifiedObject |
| targeting_cimdata_object | 0..* ChangeSetMember |
Data objects registered | IdentifiedObject |
Usages
| used by | used in | type | used |
|---|---|---|---|
| Flowgate | mkt_terminal | range | MktTerminal |
| TerminalConstraintTerm | mkt_terminal | range | MktTerminal |
Identifier and Mapping Information
Schema Source
- from schema: https://cim.ucaiug.io/ns#TC57CIM
Mappings
| Mapping Type | Mapped Value |
|---|---|
| self | cim:MktTerminal |
| native | cim:MktTerminal |
LinkML Source
Direct
name: MktTerminal
description: Subclass of IEC61970:Core:Terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
is_a: Terminal
attributes:
flowgate:
name: flowgate
from_schema: https://cim.ucaiug.io/ns#TC57CIM
slot_uri: cim:MktTerminal.Flowgate
multivalued: false
domain_of:
- FTR
- MktLine
- ViolationLimit
- HostControlArea
- RegisteredInterTie
- SchedulingPoint
- SecurityConstraints
- TransmissionInterfaceRightEntitlement
- ContractDistributionFactor
- ConstraintResults
- GeneratingUnitDynamicValues
- CongestionRevenueRight
- GenericConstraints
- TransmissionCapacity
- MktTerminal
- FlowgateValue
- FlowgateRelief
- MktPowerTransformer
- InterTieResults
range: Flowgate
required: false
terminal_constraint_term:
name: terminal_constraint_term
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:MktTerminal.TerminalConstraintTerm
multivalued: true
domain_of:
- MktTerminal
range: TerminalConstraintTerm
required: false
class_uri: cim:MktTerminal
Induced
name: MktTerminal
description: Subclass of IEC61970:Core:Terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
is_a: Terminal
attributes:
flowgate:
name: flowgate
from_schema: https://cim.ucaiug.io/ns#TC57CIM
slot_uri: cim:MktTerminal.Flowgate
multivalued: false
alias: flowgate
owner: MktTerminal
domain_of:
- FTR
- MktLine
- ViolationLimit
- HostControlArea
- RegisteredInterTie
- SchedulingPoint
- SecurityConstraints
- TransmissionInterfaceRightEntitlement
- ContractDistributionFactor
- ConstraintResults
- GeneratingUnitDynamicValues
- CongestionRevenueRight
- GenericConstraints
- TransmissionCapacity
- MktTerminal
- FlowgateValue
- FlowgateRelief
- MktPowerTransformer
- InterTieResults
range: Flowgate
required: false
terminal_constraint_term:
name: terminal_constraint_term
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:MktTerminal.TerminalConstraintTerm
multivalued: true
alias: terminal_constraint_term
owner: MktTerminal
domain_of:
- MktTerminal
range: TerminalConstraintTerm
required: false
phases:
name: phases
description: "Represents the normal network phasing condition. If the attribute\
\ is missing, three phases (ABC) shall be assumed, except for terminals of grounding\
\ classes (specializations of EarthFaultCompensator, GroundDisconnector, and\
\ Ground) which will be assumed to be N. Therefore, phase code ABCN is explicitly\
\ declared when needed, e.g. for star point grounding equipment.\r\nThe phase\
\ code on terminals connecting same ConnectivityNode or same TopologicalNode\
\ as well as for equipment between two terminals shall be consistent."
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.phases
multivalued: false
alias: phases
owner: MktTerminal
domain_of:
- Terminal
- Measurement
- SwitchingAction
- Fault
- TransformerTankEnd
- ReadingType
range: PhaseCode
required: false
topological_node:
name: topological_node
description: The topological node associated with the terminal. This can be
used as an alternative to the connectivity node path to topological node, thus
making it unnecessary to model connectivity nodes in some cases. Note that
the if connectivity nodes are in the model, this association would probably
not be used as an input specification.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
slot_uri: cim:Terminal.TopologicalNode
multivalued: false
alias: topological_node
owner: MktTerminal
domain_of:
- ReportingGroup
- BusNameMarker
- ConnectivityNodeContainer
- SvInjection
- SvVoltage
- ConnectivityNode
- Terminal
- BaseVoltage
range: TopologicalNode
required: false
connectivity_node:
name: connectivity_node
description: The connectivity node to which this terminal connects with zero impedance.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.ConnectivityNode
multivalued: false
alias: connectivity_node
owner: MktTerminal
domain_of:
- Terminal
range: ConnectivityNode
required: false
conducting_equipment:
name: conducting_equipment
description: The conducting equipment of the terminal. Conducting equipment have terminals
that may be connected to other conducting equipment terminals via connectivity
nodes or topological nodes.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.ConductingEquipment
multivalued: false
alias: conducting_equipment
owner: MktTerminal
domain_of:
- Terminal
- SvStatus
- BaseVoltage
- ProtectiveActionAdjustment
range: ConductingEquipment
required: true
regulating_control:
name: regulating_control
description: The controls regulating this terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.RegulatingControl
multivalued: true
alias: regulating_control
owner: MktTerminal
domain_of:
- Terminal
- RegulatingCondEq
- RegulationSchedule
- ProtectiveActionRegulation
range: RegulatingControl
required: false
has_first_mutual_coupling:
name: has_first_mutual_coupling
description: Mutual couplings associated with the branch as the first branch.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.HasFirstMutualCoupling
multivalued: true
alias: has_first_mutual_coupling
owner: MktTerminal
domain_of:
- Terminal
range: MutualCoupling
required: false
transformer_end:
name: transformer_end
description: All transformer ends connected at this terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.TransformerEnd
multivalued: true
alias: transformer_end
owner: MktTerminal
domain_of:
- Terminal
- TransformerStarImpedance
- TransformerCoreAdmittance
- PhaseTapChanger
- RatioTapChanger
range: TransformerEnd
required: false
branch_group_terminal:
name: branch_group_terminal
description: 'The directed branch group terminals for which this terminal is monitored. '
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.BranchGroupTerminal
multivalued: true
alias: branch_group_terminal
owner: MktTerminal
domain_of:
- Terminal
- BranchGroup
range: BranchGroupTerminal
required: false
sv_power_flow:
name: sv_power_flow
description: The power flow state variable associated with the terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.SvPowerFlow
multivalued: true
alias: sv_power_flow
owner: MktTerminal
domain_of:
- Terminal
- EnergyGroup
range: SvPowerFlow
required: false
auxiliary_equipment:
name: auxiliary_equipment
description: The auxiliary equipment connected to the terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.AuxiliaryEquipment
multivalued: true
alias: auxiliary_equipment
owner: MktTerminal
domain_of:
- Terminal
range: AuxiliaryEquipment
required: false
has_second_mutual_coupling:
name: has_second_mutual_coupling
description: Mutual couplings with the branch associated as the first branch.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.HasSecondMutualCoupling
multivalued: true
alias: has_second_mutual_coupling
owner: MktTerminal
domain_of:
- Terminal
range: MutualCoupling
required: false
tie_flow:
name: tie_flow
description: The control area tie flows to which this terminal associates.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.TieFlow
multivalued: true
alias: tie_flow
owner: MktTerminal
domain_of:
- Terminal
- AltTieMeas
- ControlArea
range: TieFlow
required: false
equipment_faults:
name: equipment_faults
description: The equipment faults at this terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.EquipmentFaults
multivalued: true
alias: equipment_faults
owner: MktTerminal
domain_of:
- Terminal
range: EquipmentFault
required: false
converter_dcsides:
name: converter_dcsides
description: All converters' DC sides linked to this point of common coupling
terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.ConverterDCSides
multivalued: true
alias: converter_dcsides
owner: MktTerminal
domain_of:
- Terminal
range: ACDCConverter
required: false
pin_terminal:
name: pin_terminal
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.PinTerminal
multivalued: true
alias: pin_terminal
owner: MktTerminal
domain_of:
- Terminal
range: PinTerminal
required: false
normal_head_feeder:
name: normal_head_feeder
description: The feeder that this terminal normally feeds. Only specified for
the terminals at head of feeders.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.NormalHeadFeeder
multivalued: false
alias: normal_head_feeder
owner: MktTerminal
domain_of:
- Terminal
range: Feeder
required: false
circuit:
name: circuit
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.Circuit
multivalued: false
alias: circuit
owner: MktTerminal
domain_of:
- Terminal
- Bay
range: Circuit
required: false
remote_input_signal:
name: remote_input_signal
description: Input signal coming from this terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.RemoteInputSignal
multivalued: true
alias: remote_input_signal
owner: MktTerminal
domain_of:
- Terminal
- VoltageCompensatorDynamics
- PowerSystemStabilizerDynamics
- WindPlantDynamics
- WindTurbineType3or4Dynamics
- UnderexcitationLimiterDynamics
- DiscontinuousExcitationControlDynamics
- WindTurbineType1or2Dynamics
- PFVArControllerType1Dynamics
range: RemoteInputSignal
required: false
bushing:
name: bushing
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:Terminal.Bushing
multivalued: false
alias: bushing
owner: MktTerminal
domain_of:
- Terminal
- BushingInsulationPF
- InterrupterUnit
range: Bushing
required: false
connected:
name: connected
description: "The connected status is related to a bus-branch model and the topological\
\ node to terminal relation. True implies the terminal is connected to the\
\ related topological node and false implies it is not. \r\nIn a bus-branch\
\ model, the connected status is used to tell if equipment is disconnected without\
\ having to change the connectivity described by the topological node to terminal\
\ relation. A valid case is that conducting equipment can be connected in one\
\ end and open in the other. In particular for an AC line segment, where the\
\ reactive line charging can be significant, this is a relevant case.\r\n"
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:ACDCTerminal.connected
multivalued: false
alias: connected
owner: MktTerminal
domain_of:
- ACDCTerminal
range: boolean
required: false
sequence_number:
name: sequence_number
description: "The orientation of the terminal connections for a multiple terminal\
\ conducting equipment. The sequence numbering starts with 1 and additional\
\ terminals should follow in increasing order. The first terminal is the \"\
starting point\" for a two terminal branch.\r\n"
from_schema: https://cim.ucaiug.io/ns#TC57CIM
slot_uri: cim:ACDCTerminal.sequenceNumber
multivalued: false
alias: sequence_number
owner: MktTerminal
domain_of:
- ModelOperationArg
- ModelOperation
- DiagramObjectPoint
- ACDCTerminal
- WorkFlowStep
- SwitchingStep
- SwitchingStepGroup
- FieldDispatchStep
- UserAttribute
- Procedure
- TimeTariffInterval
- ConsumptionTariffInterval
- WirePosition
- ACLineSegmentPhase
- RegularTimePoint
- TimePoint
- PositionPoint
- WireSegmentPhase
- ProfileData
range: integer
required: false
bus_name_marker:
name: bus_name_marker
description: The bus name marker used to name the bus (topological node).
from_schema: https://cim.ucaiug.io/ns#TC57CIM
slot_uri: cim:ACDCTerminal.BusNameMarker
multivalued: false
alias: bus_name_marker
owner: MktTerminal
domain_of:
- ReportingGroup
- ACDCTerminal
- TopologicalNode
range: BusNameMarker
required: false
operational_limit_set:
name: operational_limit_set
description: The operational limit sets at the terminal.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:ACDCTerminal.OperationalLimitSet
multivalued: true
alias: operational_limit_set
owner: MktTerminal
domain_of:
- ACDCTerminal
- OperationalLimit
- Equipment
range: OperationalLimitSet
required: false
measurements:
name: measurements
description: Measurements associated with this terminal defining where the measurement
is placed in the network topology. It may be used, for instance, to capture
the sensor position, such as a voltage transformer (PT) at a busbar or a current
transformer (CT) at the bar between a breaker and an isolator.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
slot_uri: cim:ACDCTerminal.Measurements
multivalued: true
alias: measurements
owner: MktTerminal
domain_of:
- PowerSystemResource
- ACDCTerminal
- Asset
- Location
- Procedure
- AnalogLimitSet
- AccumulatorLimitSet
range: Measurement
required: false
alias_name:
name: alias_name
description: "The aliasName is free text human readable name of the object alternative\
\ to IdentifiedObject.name. It may be non unique and may not correlate to a\
\ naming hierarchy.\r\nThe attribute aliasName is retained because of backwards\
\ compatibility between CIM relases. It is however recommended to replace aliasName\
\ with the Name class as aliasName is planned for retirement at a future time.\r\
\n\r\n"
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:IdentifiedObject.aliasName
multivalued: false
alias: alias_name
owner: MktTerminal
domain_of:
- IdentifiedObject
range: string
required: false
description:
name: description
description: The description is a free human readable text describing or naming
the object. It may be non unique and may not correlate to a naming hierarchy.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:IdentifiedObject.description
multivalued: false
alias: description
owner: MktTerminal
domain_of:
- IdentifiedObject
- NameType
- NameTypeAuthority
- DataSet
- SwitchingStepGroup
- AreaReserveSpec
range: string
required: false
m_rid:
name: m_rid
description: "Master resource identifier issued by a model authority. The mRID\
\ is unique within an exchange context. Global uniqueness is easily achieved\
\ by using a UUID, as specified in RFC 4122, for the mRID. The use of UUID is\
\ strongly recommended.\r\nFor CIMXML data files in RDF syntax conforming to\
\ IEC 61970-552, the mRID is mapped to rdf:ID or rdf:about attributes that identify\
\ CIM object elements."
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:IdentifiedObject.mRID
multivalued: false
alias: m_rid
owner: MktTerminal
domain_of:
- IdentifiedObject
- DataSet
range: string
required: false
diagram_objects:
name: diagram_objects
description: The diagram objects that are associated with the domain object.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:IdentifiedObject.DiagramObjects
multivalued: true
alias: diagram_objects
owner: MktTerminal
domain_of:
- IdentifiedObject
range: DiagramObject
required: false
instance_set:
name: instance_set
description: Dataset containing the data objects.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:IdentifiedObject.InstanceSet
multivalued: false
alias: instance_set
owner: MktTerminal
domain_of:
- IdentifiedObject
range: InstanceSet
required: true
names:
name: names
description: All names of this identified object.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:IdentifiedObject.Names
multivalued: true
alias: names
owner: MktTerminal
domain_of:
- IdentifiedObject
- NameType
range: Name
required: false
properties_cimdata_object:
name: properties_cimdata_object
description: The single CIM data object in the appropriate dataset context.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:IdentifiedObject.PropertiesCIMDataObject
multivalued: false
alias: properties_cimdata_object
owner: MktTerminal
domain_of:
- IdentifiedObject
range: ChangeSetMember
required: false
targeting_cimdata_object:
name: targeting_cimdata_object
description: Data objects registered.
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:IdentifiedObject.TargetingCIMDataObject
multivalued: true
alias: targeting_cimdata_object
owner: MktTerminal
domain_of:
- IdentifiedObject
range: ChangeSetMember
required: false
class_uri: cim:MktTerminal