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// ------------------------------------------------------------------
// Common Definition of Device Identifiers
// ------------------------------------------------------------------

syntax = "proto3";

import "common_address.proto";

package siemens.common.identifiers.v1;

//===================================================================
// Identifiers Interface Definitions
//===================================================================

// ===========================================
// The Services Definition
//
service IdentifiersApi
{
    rpc GetIdentifiers( GetIdentifiersRequest ) returns( GetIdentifiersResponse ) {}
    rpc GetSupportedSemantics( GetSupportedSemanticsRequest ) returns( GetSupportedSemanticsResponse ) {}
}

// ==================================================================
// Get Identifiers Request
//
// Get specific identifiers, identified by their semantic meaning from a device (connection)

message IdentifierRequest {
    oneof identifier {
        // The specific identifier which is requested
        SemanticClassifier semantic = 1;
        // if a Identifier does not have a semantic mapping we can use the name of it as fallback
        string name = 2;
    }
}

message GetIdentifiersRequest {
    siemens.common.address.v1.Destination target = 1; //the device to which the nodes/data points belong
    repeated IdentifierRequest identifiers = 2; // if no specific identifiers are provided, all supported identifiers (see GetSupportedIdentifiers) are returned
}

message GetIdentifiersResponse {
   repeated DeviceIdentifier identifiers = 1;
}

// ==================================================================
// Get supported identifier
//
// Get the list of identifiers and their semantic meaning which are supported by the connector

message GetSupportedSemanticsRequest {
    // void
}

message GetSupportedSemanticsResponse {
  repeated SupportedSemantic supportedSemantic = 1;
}

// ==================================================================
// Identifier definitions
//

// This message type is defined to work-around missing
// support for "repeated oneof" in gRPC. See
// https://github.com/protocolbuffers/protobuf/issues/2592
// for further reference.
message DeviceIdentifierValueList {
    repeated DeviceIdentifier value = 1;
}

message DeviceIdentifier {
    // The RAW value of the identifier, read from the device (connection)
    oneof value {
        // Transfer any integer value up to 64 bit
        int64 int64_value = 2;
        // Transfer any unsigned integer value up to 64 bit
        uint64 uint64_value = 3;
        // Transfer any floating point value
        double float64_value = 4;
        // Transfer a UTF8-text
        string text = 5;
        // Raw data
        bytes raw_data = 6;
        // A list of child identifiers. This value type
        // can be used to transfer structured, hierarchical
        // information.
        // Example: Ethernet interface (parent identifier) with
        // its assigned IP addresses (child identifiers) and MAC
        // address (another child identifier).
        DeviceIdentifierValueList children = 7;
    }

    // List of semantic mappings for this identifier
    repeated SemanticClassifier classifiers = 8;
}

message SupportedSemantic {
    // Human readable name of the identifier, e.g. "Manufacturer"
    string name = 1;
    // List of semantic identifiers
    repeated SemanticClassifier classifiers = 2;
}

message SemanticClassifier {
    // The type of the semantic identifier
    // supported default classifier:
    // "IRDI": e.g. for "CDD" or "eClass" classifier)
    // "URI": e.g. for JSON-Link
    string type = 1;
    // The value of the semantic identifier, e.g. "0112/2///61987#ABA565#007" (IEC CDD/IRDI "Manufacturer")
    string value = 2;
}