Which piece of information does the source Message Structure NOT provide?

The source Message Structure primarily focuses on detailing the specific components and arrangements of the message type within the Avaloq Message Interface. This includes defining subsets of fields, which are critical for understanding how information is categorized within the message. Additionally, it outlines the structure of the message type, specifying how different fields are laid out, including field sequences, which dictate the order in which fields must appear in the message.

However, the sender and receiver information typically does not fall under the remit of the Message Structure itself. Instead, this information is usually established through other mechanisms that handle message transmission and routing, which are separate from the structural definition of the message content. This distinction is why the answer correctly identifies that the source Message Structure does not provide sender and receiver information.