Documentation

A AttributeKey is a name for an attribute. The type parameter sets the type of the attribute the key should be associated with. This is useful for standardising attribute keys, since we can define both the key and the type of value it is intended to record.

For example, we might define:

-- See https://opentelemetry.io/docs/specs/semconv/attributes-registry/server/
serverPortKey :: AttributeKey Int
serverPortKey = "server.port"