mirror of https://github.com/grpc/grpc.git
The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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79 lines
3.2 KiB
79 lines
3.2 KiB
// This file will be moved to a new location. |
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// Copyright 2015, Google Inc. |
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// All rights reserved. |
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// |
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// Redistribution and use in source and binary forms, with or without |
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// modification, are permitted provided that the following conditions are |
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// met: |
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// |
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// * Redistributions of source code must retain the above copyright |
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// notice, this list of conditions and the following disclaimer. |
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// * Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// * Neither the name of Google Inc. nor the names of its |
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// contributors may be used to endorse or promote products derived from |
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// this software without specific prior written permission. |
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// |
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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// Labels provide a way to associate user-defined metadata with various |
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// objects. Labels may be used to organize objects into non-hierarchical |
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// groups; think metadata tags attached to mp3s. |
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syntax = "proto2"; |
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package tech.label; |
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// A key-value pair applied to a given object. |
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message Label { |
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// The key of a label is a syntactically valid URL (as per RFC 1738) with |
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// the "scheme" and initial slashes omitted and with the additional |
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// restrictions noted below. Each key should be globally unique. The |
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// "host" portion is called the "namespace" and is not necessarily |
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// resolvable to a network endpoint. Instead, the namespace indicates what |
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// system or entity defines the semantics of the label. Namespaces do not |
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// restrict the set of objects to which a label may be associated. |
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// |
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// Keys are defined by the following grammar: |
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// |
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// key = hostname "/" kpath |
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// kpath = ksegment *[ "/" ksegment ] |
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// ksegment = alphadigit | *[ alphadigit | "-" | "_" | "." ] |
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// |
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// where "hostname" and "alphadigit" are defined as in RFC 1738. |
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// |
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// Example key: |
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// spanner.google.com/universe |
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required string key = 1; |
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// The value of the label. |
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oneof value { |
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// A string value. |
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string str_value = 2; |
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// An integer value. |
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int64 num_value = 3; |
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} |
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} |
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// A collection of labels, such as the set of all labels attached to an |
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// object. Each label in the set must have a different key. |
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// |
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// Users should prefer to embed "repeated Label" directly when possible. |
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// This message should only be used in cases where that isn't possible (e.g. |
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// with oneof). |
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message Labels { |
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repeated Label label = 1; |
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}
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