The linked span is a child of the current span.

The linked span is a parent of the current span.

The relationship of the two spans is unknown.

Indicates a received message.

Indicates a sent message.

Unknown event type.

The allowed types for [VALUE] in a `[KEY]:[VALUE]` attribute.

The request message for the `BatchWriteSpans` method.

Binary module.

A span represents a single operation within a trace.

A set of attributes, each in the format `[KEY]:[VALUE]`.

A pointer from the current span to another span in the same trace or in a different trace.

A collection of links, which are references from this span to a span in the same or different trace.

A time-stamped annotation or message event in the Span.

Text annotation with a set of attributes.

An event describing a message sent/received between Spans.

A collection of `TimeEvent`s.

A call stack appearing in a trace.

Represents a single stack frame in a stack trace.

A collection of stack frames, which can be truncated.

Represents a string that might be shortened to a specified length.

The relationship of the current span relative to the linked span: child, parent, or unspecified.

Indicates whether the message was sent or received.