// Defines the text format for including per-op API definition and
// overrides for client language op code generators.

syntax = "proto3";

package tensorflow;
option cc_enable_arenas = true;
option java_outer_classname = "ApiDefProtos";
option java_multiple_files = true;
option java_package = "org.tensorflow.framework";
import "tensorflow/core/framework/attr_value.proto";

// Used to specify and override the default API & behavior in the
// generated code for client languages, from what you would get from
// the OpDef alone. There will be a set of ApiDefs that are common
// to all client languages, and another set per client language.
// The per-client-language ApiDefs will inherit values from the
// common ApiDefs which it can either replace or modify.
//
// We separate the API definition from the OpDef so we can evolve the
// API while remaining backwards compatible when interpretting old
// graphs.  Overrides go in an "api_def.pbtxt" file with a text-format
// ApiDefs message.
//
// WARNING: Be *very* careful changing the API for any existing op --
// you can change the semantics of existing code.  These changes may
// need to wait until a major release of TensorFlow to avoid breaking
// our compatibility promises.
message ApiDef {
  // Name of the op (in the OpDef) to specify the API for.
  string graph_op_name = 1;

  enum Visibility {
    // Normally this is "VISIBLE" unless you are inheriting a
    // different value from another ApiDef.
    DEFAULT_VISIBILITY = 0;
    // Publicly visible in the API.
    VISIBLE = 1;
    // Do not include this op in the generated API. If visibility is
    // set to 'SKIP', other fields are ignored for this op.
    SKIP = 2;
    // Hide this op by putting it into an internal namespace (or whatever
    // is appropriate in the target language).
    HIDDEN = 3;
  }
  Visibility visibility = 2;

  // If you specify any endpoint, this will replace all of the
  // inherited endpoints.  The first endpoint should be the
  // "canonical" endpoint, and should not be deprecated (unless all
  // endpoints are deprecated).
  message Endpoint {
    // Name should be either like "CamelCaseName" or
    // "Package.CamelCaseName". Client-language-specific ApiDefs may
    // use a snake_case convention instead of CamelCase.
    string name = 1;

    // First GraphDef version at which the op is disallowed.
    int32 deprecation_version = 2;
  }
  repeated Endpoint endpoint = 3;

  message Arg {
    string name = 1;

    // Change the name used to access this arg in the API from what
    // is used in the GraphDef.  Note that these names in `backticks`
    // will also be replaced in the summary & description fields.
    string rename_to = 2;

    // Note: this will replace any inherited arg doc. There is no
    // current way of modifying arg descriptions (other than replacing
    // them entirely) as can be done with op descriptions.
    string description = 3;
  }
  repeated Arg in_arg = 4;
  repeated Arg out_arg = 5;
  // List of original in_arg names to specify new argument order.
  // Length of arg_order should be either empty to keep current order
  // or match size of in_arg.
  repeated string arg_order = 11;

  // Description of the graph-construction-time configuration of this
  // Op.  That is to say, this describes the attr fields that will
  // be specified in the NodeDef.
  message Attr {
    string name = 1;

    // Change the name used to access this attr in the API from what
    // is used in the GraphDef.  Note that these names in `backticks`
    // will also be replaced in the summary & description fields.
    string rename_to = 2;

    // Specify a new default value to use for this attr.  This default
    // will be used when creating new graphs, as opposed to the
    // default in the OpDef, which will be used when interpreting old
    // GraphDefs.
    AttrValue default_value = 3;

    // Note: this will replace any inherited attr doc, there is no current
    // way of modifying attr descriptions as can be done with op descriptions.
    string description = 4;
  }
  repeated Attr attr = 6;

  // One-line human-readable description of what the Op does.
  string summary = 7;

  // Additional, longer human-readable description of what the Op does.
  string description = 8;

  // Modify an existing/inherited description by adding text to the beginning
  // or end.
  string description_prefix = 9;
  string description_suffix = 10;
}

message ApiDefs {
  repeated ApiDef op = 1;
}
