Connectivity Software User's Guide and Reference
UAFilterOperator Enumeration
Example Example 



OpcLabs.EasyOpcUAPrimitives Assembly > OpcLabs.EasyOpc.UA.Filtering Namespace : UAFilterOperator Enumeration
Filter operator to be evaluated.
Syntax
'Declaration
 

<ComVisibleAttribute(True)>
<DisplayName2Attribute("OPC-UA Filter Operator")>
<GuidAttribute("8095F877-5AE6-4E17-99C1-9951A6FA90E0")>
Public Enum UAFilterOperator 
   Inherits System.Enum
   Implements System.IComparable, System.IConvertible, System.IFormattable 
'Usage
 

Dim instance As UAFilterOperator
[ComVisible(true)]
[DisplayName2("OPC-UA Filter Operator")]
[Guid("8095F877-5AE6-4E17-99C1-9951A6FA90E0")]
public enum UAFilterOperator : System.Enum, System.IComparable, System.IConvertible, System.IFormattable  
[ComVisible(true)]
[DisplayName2("OPC-UA Filter Operator")]
[Guid("8095F877-5AE6-4E17-99C1-9951A6FA90E0")]
public enum class UAFilterOperator : public System.Enum, System.IComparable, System.IConvertible, System.IFormattable
Members
MemberValueDescription
And11TRUE if operand[0] and operand[1] are TRUE.

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to a Boolean.
[1]: Any operand that resolves to a Boolean.
If any operand cannot be resolved to a Boolean it is considered a NULL.

The value of this enum member is 11.

Between9TRUE if operand[0] is greater or equal to operand[1] and less than or equal to operand[2].

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to an ordered value.
[1]: Any operand that resolves to an ordered value.
[2]: Any operand that resolves to an ordered value.
If the operands are of different types, the system shall perform any implicit conversion to match all operands to a common type. If no implicit conversion is available and the operands are of different types, the particular result is FALSE.

The value of this enum member is 9.

BitwiseAnd17The result is an integer which matches the size of the largest operand and contains a bitwise And operation of the two operands where both have been converted to the same size (largest of the two operands).

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to an integer.
[1]: Any operand that resolves to an integer.
If any operand cannot be resolved to an integer it is considered a NULL.

The value of this enum member is 17.

BitwiseOr18The result is an integer which matches the size of the largest operand and contains a bitwise Or operation of the two operands where both have been converted to the same size (largest of the two operands).

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to an integer.
[1]: Any operand that resolves to an integer.
If any operand cannot be resolved to an integer it is considered a NULL.

The value of this enum member is 18.

Cast13Converts operand[0] to a value with a data type with a NodeId identified by operand[1].

Remarks:

The following restrictions apply to the operands:
[0]: Any operand.
[1]: Any operand that resolves to a NodeId or ExpandedNodeId where the Node is of the NodeClass DataType.
If there is any error in conversion or in any of the parameters then the Cast Operation evaluates to a NULL.

The value of this enum member is 13.

Equals1TRUE if operand[0] is equal to operand[1].

Remarks:

If the operands are of different types, the system shall perform any implicit conversion to a common type. This operator resolves to FALSE if no implicit conversion is available and the operands are of different types. This operator returns FALSE if the implicit conversion fails.

The value of this enum member is 1.

GreaterThan3TRUE if operand[0] is greater than operand[1].

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to an ordered value.
[1]: Any operand that resolves to an ordered value.
The same conversion rules as defined for Equals apply.

The value of this enum member is 3.

GreaterThanOrEqual5TRUE if operand[0] is greater than or equal to operand[1].

Remarks:

The same conversion rules and restrictions as defined for GreaterThan apply.

The value of this enum member is 5.

InList10TRUE if operand[0] is equal to one or more of the remaining operands.

Remarks:

The Equals Operator is evaluated for operand[0] and each remaining operand in the list. If any Equals evaluation is TRUE, InList returns TRUE.

The value of this enum member is 10.

InView14TRUE if the target Node is contained in the View defined by operand[0].

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to a NodeId that identifies a View Node.
If operand[0] does not resolve to a NodeId that identifies a View Node, this operation shall always be False.

The value of this enum member is 14.

IsNull2TRUE if operand[0] is a null value.

The value of this enum member is 2.

LessThan4TRUE if operand[0] is less than operand[1].

Remarks:

The same conversion rules and restrictions as defined for GreaterThan apply.

The value of this enum member is 4.

LessThanOrEqual6TRUE if operand[0] is less than or equal to operand[1].

Remarks:

The same conversion rules and restrictions as defined for GreaterThan apply.

The value of this enum member is 6.

Like7TRUE if operand[0] matches a pattern defined by operand[1].

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to a String.
[1]: Any operand that resolves to a String.
This operator resolves to FALSE if no operand can be resolved to a string.

The value of this enum member is 7.

None0No operator.

Remarks:

This value cannot be actually passed to the server.

The value of this enum member is 0.

Not8TRUE if operand[0] is FALSE.

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to a Boolean.
If the operand cannot be resolved to a Boolean, the result is a NULL.

The value of this enum member is 8.

OfType15TRUE if the target Node is of type operand[0] or of a subtype of operand[0].

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to a NodeId that identifies an ObjectType or VariableType Node.
If operand[0]oes not resolve to a NodeId that identifies an ObjectType or VariableType Node, this operation shall always be False.

The value of this enum member is 15.

Or12TRUE if operand[0] or operand[1] are TRUE.

Remarks:

The following restrictions apply to the operands:
[0]: Any operand that resolves to a Boolean.
[1]: Any operand that resolves to a Boolean.
If any operand cannot be resolved to a Boolean it is considered a NULL.

The value of this enum member is 12.

RelatedTo16TRUE if the target Node is of type Operand[0] and is related to a NodeId of the type defined in Operand[1] by the Reference type defined in Operand[2].

Remarks:

Operand[0] or Operand[1] can also point to an element Reference where the referred to element is another RelatedTo operator. This allows chaining of relationships (e.g. A is related to B is related to C), where the relationship is defined by the ReferenceType defined in Operand[2]. In this case, the referred to element returns a list of NodeIds instead of TRUE or FALSE. In this case if any errors occur or any of the operands cannot be resolved to an appropriate value, the result of the chained relationship is an empty list of nodes.
Operand[3] defines the number of hops for which the relationship should be followed. If Operand[3] is 1, then objects shall be directly related. If a hop is greater than 1, then a NodeId of the type described in Operand[1] is checked for at the depth specified by the hop. In this case, the type of the intermediate Node is undefined, and only the Reference type used to reach the end Node is defined. If the requested number of hops cannot be followed, then the result is FALSE, i.e., an empty Node list. If Operand[3] is 0, the relationship is followed to its logical end in a forward direction and each Node is checked to be of the type specified in Operand[1]. If any Node satisfies this criterion, then the result is TRUE, i.e., the NodeId is included in the sub-list.
Operand [4] defines if Operands [0] and [1] should include support for subtypes of the types defined by these operands. A TRUE indicates support for subtypes.
Operand [5] defines if Operand [2] should include support for subtypes of the reference type. A TRUE indicates support for subtypes.

The following restrictions apply to the operands:
[0]: Any operand that resolves to a NodeId or ExpandedNodeId that identifies an ObjectType or VariableType Node or a reference to another element which is a RelatedTo operator.
[1]: Any operand that resolves to a NodeId or ExpandedNodeId that identifies an ObjectType or VariableType Node or a reference to another element which is a RelatedTo operator.
[2]: Any operand that resolves to a NodeId that identifies a ReferenceType Node.
[3]: Any operand that resolves to a value implicitly convertible to Uint32.
[4]: Any operand that resolves to a value implicitly convertible to a boolean; if this operand does not resolve to a Boolean, then a value of FALSE is used.
[5]: Any operand that resolves to a value implicitly convertible to a boolean; if this operand does not resolve to a Boolean, then a value of FALSE is used.
If none of the operands [0], [1], [2], [3] resolves to an appropriate value then the result of this operation shall always be False (or an Empty set in the case of a nested RelatedTo operand).

The value of this enum member is 16.

Example
// This example shows how to specify criteria for event notifications.
//
// Find all latest examples here: https://www.doc-that.com/files/onlinedocs/OPCLabs-ConnectivityStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-ConnectivityStudio-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://forum.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.AddressSpace.Standard;
using OpcLabs.EasyOpc.UA.AlarmsAndConditions;
using OpcLabs.EasyOpc.UA.Filtering;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples.AlarmsAndConditions
{
    class WhereClause
    {
        public static void Main1()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:62544/Quickstarts/AlarmConditionServer";

            // Instantiate the client object and hook events.
            var client = new EasyUAClient();
            client.EventNotification += client_EventNotification;

            Console.WriteLine("Subscribing...");
            client.SubscribeEvent(
                endpointDescriptor,
                UAObjectIds.Server,
                1000,
                new UAEventFilterBuilder(
                    // Either the severity is >= 500, or the event comes from a specified source node
                    UAFilterElements.Or(
                        UAFilterElements.GreaterThanOrEqual(UABaseEventObject.Operands.Severity, 500),
                        UAFilterElements.Equals(
                            UABaseEventObject.Operands.SourceNode, 
                            new UANodeId("nsu=http://opcfoundation.org/Quickstarts/AlarmCondition ;ns=2;s=1:Metals/SouthMotor"))),
                    UABaseEventObject.AllFields));

            Console.WriteLine("Processing event notifications for 30 seconds...");
            System.Threading.Thread.Sleep(30 * 1000);

            Console.WriteLine("Unsubscribing...");
            client.UnsubscribeAllMonitoredItems();

            Console.WriteLine("Waiting for 5 seconds...");
            System.Threading.Thread.Sleep(5 * 1000);

            Console.WriteLine("Finished.");
        }

        static void client_EventNotification(object sender, EasyUAEventNotificationEventArgs e)
        {
            // Display the event.
            Console.WriteLine(e);
        }


        // Example output:
        //
        //Subscribing...
        //13000008
        //Processing event notifications for 30 seconds...
        //[] Success
        //[] Success; Refresh; RefreshInitiated
        //[] Success; Refresh; [SouthMotor] 100! {DialogConditionType} "The dialog was activated" @9/9/2021 2:22:18 PM (10 fields)
        //[] Success; Refresh; [SouthMotor] 700! {ExclusiveDeviationAlarmType} "The alarm severity has increased." @9/22/2021 7:17:59 AM (10 fields)
        //[] Success; Refresh; [SouthMotor] 900! {NonExclusiveLevelAlarmType} "The alarm severity has increased." @9/22/2021 7:17:57 AM (10 fields)
        //[] Success; Refresh; [SouthMotor] 100! {TripAlarmType} "The alarm is active." @9/22/2021 7:17:59 AM (10 fields)
        //[] Success; Refresh; [SouthMotor] 100! {TripAlarmType} "The alarm severity has increased." @9/9/2021 3:39:51 PM (10 fields)
        //[] Success; Refresh; [SouthMotor] 100! {TripAlarmType} "The alarm severity has increased." @9/9/2021 3:38:57 PM (10 fields)
        //[] Success; Refresh; RefreshComplete
        //[] Success; [SouthMotor] 100! {NonExclusiveLevelAlarmType} "The alarm was deactivated by the system." @9/22/2021 7:18:05 AM (10 fields)
        //[] Success; [SouthMotor] 300! {TripAlarmType} "The alarm severity has increased." @9/22/2021 7:18:08 AM (10 fields)
        //[] Success; [SouthMotor] 900! {ExclusiveDeviationAlarmType} "The alarm severity has increased." @9/22/2021 7:18:10 AM (10 fields)
        //[] Success; [SouthMotor] 100! {NonExclusiveLevelAlarmType} "The alarm is active." @9/22/2021 7:18:13 AM (10 fields)
        //[] Success; [SouthMotor] 500! {TripAlarmType} "The alarm severity has increased." @9/22/2021 7:18:17 AM (10 fields)
        //[] Success; [SouthMotor] 100! {ExclusiveDeviationAlarmType} "The alarm was deactivated by the system." @9/22/2021 7:18:21 AM (10 fields)
        //[] Success; [SouthMotor] 300! {NonExclusiveLevelAlarmType} "The alarm severity has increased." @9/22/2021 7:18:21 AM (10 fields)
        //[] Success; [SouthMotor] 700! {TripAlarmType} "The alarm severity has increased." @9/22/2021 7:18:26 AM (10 fields)
        //[] Success; [SouthMotor] 500! {NonExclusiveLevelAlarmType} "The alarm severity has increased." @9/22/2021 7:18:29 AM (10 fields)
        //[] Success; [SouthMotor] 100! {ExclusiveDeviationAlarmType} "The alarm is active." @9/22/2021 7:18:32 AM (10 fields)
        //Unsubscribing...
        //Waiting for 5 seconds...
        //Finished.
    }
}
# This example shows how to specify criteria for event notifications.
#
# Find all latest examples here: https://www.doc-that.com/files/onlinedocs/OPCLabs-ConnectivityStudio/Latest/examples.html .
# OPC client and subscriber examples in PowerShell on GitHub: https://github.com/OPCLabs/Examples-ConnectivityStudio-PowerShell .
# Missing some example? Ask us for it on our Online Forums, https://forum.opclabs.com/forum/index ! You do not have to own
# a commercial license in order to use Online Forums, and we reply to every post.

#requires -Version 5.1
using namespace OpcLabs.EasyOpc.UA
using namespace OpcLabs.EasyOpc.UA.AddressSpace
using namespace OpcLabs.EasyOpc.UA.AddressSpace.Standard

# The path below assumes that the current directory is [ProductDir]/Examples-NET/PowerShell/Windows .
Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUAPrimitives.dll"
Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUACore.dll"
Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUA.dll"
Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUAComponents.dll"

# Define which server we will work with.
[UAEndpointDescriptor]$endpointDescriptor = "opc.tcp://opcua.demo-this.com:62544/Quickstarts/AlarmConditionServer"

# Instantiate the client object.
$client = New-Object EasyUAClient

# Event notification handler
Register-ObjectEvent -InputObject $client -EventName EventNotification -Action { 
    # Display the event.
    Write-Host $EventArgs
}

Write-Host "Subscribing..."
[IEasyUAClientExtension]::SubscribeEvent($client, 
    $endpointDescriptor, 
    [UAObjectIds]::Server, 
    1000,
    [UAEventFilter](New-Object UAEventFilterBuilder(
        [UAFilterElements]::Equals(
            [UABaseEventObject+Operands]::SourceNode, 
            (New-Object UANodeId("nsu=http://opcfoundation.org/Quickstarts/AlarmCondition ;ns=2;s=1:Metals/SouthMotor"))),
        [UABaseEventObject]::AllFields))
    )

Write-Host "Processing event notifications for 30 seconds..."
$stopwatch =  [System.Diagnostics.Stopwatch]::StartNew() 
while ($stopwatch.Elapsed.TotalSeconds -lt 30) {    
    Start-Sleep -Seconds 1
}

Write-Host "Unsubscribing..."
$client.UnsubscribeAllMonitoredItems()

Write-Host "Waiting for 5 seconds..."
Start-Sleep -Seconds 5

Write-Host "Finished."


# Example output:
#
#Subscribing...
#13000008
#Processing event notifications for 30 seconds...
#[] Success
#[] Success; Refresh; RefreshInitiated
#[] Success; Refresh; [SouthMotor] 100! {DialogConditionType} "The dialog was activated" @9/9/2021 2:22:18 PM (10 fields)
#[] Success; Refresh; [SouthMotor] 700! {ExclusiveDeviationAlarmType} "The alarm severity has increased." @9/22/2021 7:17:59 AM (10 fields)
#[] Success; Refresh; [SouthMotor] 900! {NonExclusiveLevelAlarmType} "The alarm severity has increased." @9/22/2021 7:17:57 AM (10 fields)
#[] Success; Refresh; [SouthMotor] 100! {TripAlarmType} "The alarm is active." @9/22/2021 7:17:59 AM (10 fields)
#[] Success; Refresh; [SouthMotor] 100! {TripAlarmType} "The alarm severity has increased." @9/9/2021 3:39:51 PM (10 fields)
#[] Success; Refresh; [SouthMotor] 100! {TripAlarmType} "The alarm severity has increased." @9/9/2021 3:38:57 PM (10 fields)
#[] Success; Refresh; RefreshComplete
#[] Success; [SouthMotor] 100! {NonExclusiveLevelAlarmType} "The alarm was deactivated by the system." @9/22/2021 7:18:05 AM (10 fields)
#[] Success; [SouthMotor] 300! {TripAlarmType} "The alarm severity has increased." @9/22/2021 7:18:08 AM (10 fields)
#[] Success; [SouthMotor] 900! {ExclusiveDeviationAlarmType} "The alarm severity has increased." @9/22/2021 7:18:10 AM (10 fields)
#[] Success; [SouthMotor] 100! {NonExclusiveLevelAlarmType} "The alarm is active." @9/22/2021 7:18:13 AM (10 fields)
#[] Success; [SouthMotor] 500! {TripAlarmType} "The alarm severity has increased." @9/22/2021 7:18:17 AM (10 fields)
#[] Success; [SouthMotor] 100! {ExclusiveDeviationAlarmType} "The alarm was deactivated by the system." @9/22/2021 7:18:21 AM (10 fields)
#[] Success; [SouthMotor] 300! {NonExclusiveLevelAlarmType} "The alarm severity has increased." @9/22/2021 7:18:21 AM (10 fields)
#[] Success; [SouthMotor] 700! {TripAlarmType} "The alarm severity has increased." @9/22/2021 7:18:26 AM (10 fields)
#[] Success; [SouthMotor] 500! {NonExclusiveLevelAlarmType} "The alarm severity has increased." @9/22/2021 7:18:29 AM (10 fields)
#[] Success; [SouthMotor] 100! {ExclusiveDeviationAlarmType} "The alarm is active." @9/22/2021 7:18:32 AM (10 fields)
#Unsubscribing...
#Waiting for 5 seconds...
#Finished.

' This example shows how to specify criteria for event notifications.
'
' Find all latest examples here: https://www.doc-that.com/files/onlinedocs/OPCLabs-ConnectivityStudio/Latest/examples.html .
' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-ConnectivityStudio-VBNET .
' Missing some example? Ask us for it on our Online Forums, https://forum.opclabs.com/forum/index ! You do not have to own
' a commercial license in order to use Online Forums, and we reply to every post.

Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.AddressSpace
Imports OpcLabs.EasyOpc.UA.AddressSpace.Standard
Imports OpcLabs.EasyOpc.UA.AlarmsAndConditions
Imports OpcLabs.EasyOpc.UA.Filtering
Imports OpcLabs.EasyOpc.UA.OperationModel

Namespace Global.UADocExamples.AlarmsAndConditions
    Friend Class WhereClause
        Public Shared Sub Main1()
            ' Instantiate the client object and hook events
            Dim client = New EasyUAClient()
            AddHandler client.EventNotification, AddressOf client_EventNotification

            Console.WriteLine("Subscribing...")
            ' Either the severity is >= 500, or the event comes from a specified source node
            client.SubscribeEvent( _
                "opc.tcp://opcua.demo-this.com:62544/Quickstarts/AlarmConditionServer", _
                UAObjectIds.Server, _
                1000, _
                New UAEventFilterBuilder( _
                    UAFilterElements.Or( _
                        UAFilterElements.GreaterThanOrEqual(UABaseEventObject.Operands.Severity, 500),
                        UAFilterElements.Equals( _
                            UABaseEventObject.Operands.SourceNode,
                            New UANodeId("nsu=http://opcfoundation.org/Quickstarts/AlarmCondition ;ns=2;s=1:Metals/SouthMotor"))),
                    UABaseEventObject.AllFields))

            Console.WriteLine("Processing event notifications for 30 seconds...")
            Threading.Thread.Sleep(30 * 1000)

            Console.WriteLine("Unsubscribing...")
            client.UnsubscribeAllMonitoredItems()

            Console.WriteLine("Waiting for 5 seconds...")
            Threading.Thread.Sleep(5 * 1000)
        End Sub

        Private Shared Sub client_EventNotification(ByVal sender As Object, ByVal e As EasyUAEventNotificationEventArgs)
            ' Display the event
            Console.WriteLine(e)
        End Sub
    End Class
End Namespace

# This example shows how to specify criteria for event notifications.
#
# Find all latest examples here: https://www.doc-that.com/files/onlinedocs/OPCLabs-ConnectivityStudio/Latest/examples.html .
# OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-ConnectivityStudio-Python .
# Missing some example? Ask us for it on our Online Forums, https://forum.opclabs.com/forum/index ! You do not have to own
# a commercial license in order to use Online Forums, and we reply to every post.
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc
import time

# Import .NET namespaces.
from OpcLabs.EasyOpc.UA import *
from OpcLabs.EasyOpc.UA.AddressSpace import *
from OpcLabs.EasyOpc.UA.AddressSpace.Standard import *
from OpcLabs.EasyOpc.UA.AlarmsAndConditions import *
from OpcLabs.EasyOpc.UA.Filtering import *
from OpcLabs.EasyOpc.UA.OperationModel import *


def eventNotification(sender, eventArgs):
    # Display the event.
    print(eventArgs)


# Define which server we will work with.
endpointDescriptor = UAEndpointDescriptor('opc.tcp://opcua.demo-this.com:62544/Quickstarts/AlarmConditionServer')

# Instantiate the client object and hook events.
client = EasyUAClient()
client.EventNotification += eventNotification

print('Subscribing...')

eventFilterBuilder = UAEventFilterBuilder(
    # Either the severity is >= 500, or the event comes from a specified source node.
    UAFilterElements.Or(
        UAFilterElements.GreaterThanOrEqual(UABaseEventObject.Operands.Severity, 500),
        UAFilterElements.Equals(
            UABaseEventObject.Operands.SourceNode,
            UANodeId('nsu=http://opcfoundation.org/Quickstarts/AlarmCondition ;ns=2;s=1:Metals/SouthMotor'))),
    UABaseEventObject.AllFields)

IEasyUAClientExtension.SubscribeEvent(
    client,
    endpointDescriptor,
    UANodeDescriptor(UAObjectIds.Server),
    1000,
    UAEventFilterBuilder.ToUAEventFilter(eventFilterBuilder))

print('Processing event notifications for 30 seconds...')
time.sleep(30)

print('Unsubscribing...')
client.UnsubscribeAllMonitoredItems()

print('Waiting for 5 seconds...')
time.sleep(5)

print('Finished.')
Inheritance Hierarchy

System.Object
   System.ValueType
      System.Enum
         OpcLabs.EasyOpc.UA.Filtering.UAFilterOperator

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also

Reference

OpcLabs.EasyOpc.UA.Filtering Namespace

 

 

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