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**To describe a gateway capability** The following ``describe-gateway-capability-configuration`` example describes an OPC-UA source capability. :: aws iotsitewise describe-gateway-capability-configuration \ --gateway-id a1b2c3d4-5678-90ab-cdef-1a1a1EXAMPLE \ --capability-namespace "iotsitewise:opcuacollector:1" Output:: { "gatewayId": "a1b2c3d4-5678-90ab-cdef-1a1a1EXAMPLE", "capabilityNamespace": "iotsitewise:opcuacollector:1", "capabilityConfiguration": "{\"sources\":[{\"name\":\"Wind Farm #1\",\"endpoint\":{\"certificateTrust\":{\"type\":\"TrustAny\"},\"endpointUri\":\"opc.tcp://203.0.113.0:49320\",\"securityPolicy\":\"BASIC256\",\"messageSecurityMode\":\"SIGN_AND_ENCRYPT\",\"identityProvider\":{\"type\":\"Username\",\"usernameSecretArn\":\"arn:aws:secretsmanager:us-east-1:123456789012:secret:greengrass-factory1-auth-3QNDmM\"},\"nodeFilterRules\":[]},\"measurementDataStreamPrefix\":\"\"}]}", "capabilitySyncStatus": "IN_SYNC" } For more information, see `Configuring data sources <https://docs.aws.amazon.com/iot-sitewise/latest/userguide/configure-sources.html>`__ in the *AWS IoT SiteWise User Guide*.