+It is made of "event packets", which each start with an event packet
+header. The event type within the metadata stream have no event header
+nor event context. Each event only contains a "string" payload without
+any null-character. The events are packed one next to another. Each
+event packet start with an event packet header, which contains, amongst
+other fields, the magic number, trace UUID and packet length. In the
+event packet header, the trace UUID is represented as an array of bytes.
+Within the string-based metadata description, the trace UUID is
+represented as a string of hexadecimal digits and dashes "-".