tr><th>Proto</th><th>YAML</th></tr><tr><td><pre>
enum ValueType {
    STRING = 1;
    INT64 = 2;
    DOUBLE = 3;
    // more values omitted
}

message AttributeDescriptor {
    string name = 1;
    string description = 2;
    ValueType value_type = 3;
}
</pre></td><td><pre>
name: request.duration
value_type: INT64
</pre>or<pre>
name: request.duration
valueType: INT64
</pre></td></tr></tbody></table><p><em>Note that YAML parsing will handle both <code>snake_case</code> and <code>lowerCamelCase</code> field n