 // 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 names. <code>lowerCamelCase</code> is the canonical version in YAML.</em></p><h3 id="nested-message-fields">Nested <c