milvus/pkg/proto/model_service.proto

syntax = "proto3";

package milvus.proto.modelservice;
option go_package="github.com/milvus-io/milvus/pkg/v2/proto/modelservicepb";

service TextEmbeddingService {
    rpc Embedding(TextEmbeddingRequest) returns (TextEmbeddingResponse);
}

service RerankService {
    rpc Rerank(TextRerankRequest) returns (TextRerankResponse);
}

message Status {
    int32 code = 1;
    string msg = 2;
}

message DenseVector {
    enum DType {
	DTYPE_UNSPECIFIED = 0;
	DTYPE_FLOAT = 1;
	DTYPE_INT8 = 2;
    }

    DType dtype = 1;
    bytes data = 2;
    int32 dim = 3; // Optional
}

message SparseVector {
    repeated int32 indices = 1;
    repeated float values = 2;
}

message MultiVector {
    repeated DenseVector token_vectors = 1;
    int32 dim = 2; // Optional
}

message TextEmbeddingRequest {
    string model = 1;
    repeated string texts = 2;
    map<string, string> params = 3;
}

message EmbeddingResult {
    DenseVector dense = 1;
    SparseVector sparse = 2;
    MultiVector multi_vector = 3;
}

message TextEmbeddingResponse {
    Status status = 1;
    map<string, string> extra_info = 2;
    repeated EmbeddingResult results = 3;
}

message TextRerankRequest {
    string model = 1;
    string query = 2;
    repeated string documents = 3;
    map<string, string> params = 4;
}

message TextRerankResponse {
    Status status = 1;
    map<string, string> extra_info = 2;
    repeated float scores = 3;
}