This message defines the standard attribute vocabulary for Google APIs.

An attribute is a piece of metadata that describes an activity on a network service. For example, the size of an HTTP request, or the status code of an HTTP response.

Each attribute has a type and a name, which is logically defined as a proto message field in AttributeContext. The field type becomes the attribute type, and the field path becomes the attribute name. For example, the attribute source.ip maps to field AttributeContext.source.ip.

This message definition is guaranteed not to have any wire breaking change. So you can use it directly for passing attributes across different systems.

NOTE: Different system may generate different subset of attributes. Please verify the system specification before relying on an attribute generated a system.