In terms of shipment status, which document identifier is used?

The document identifier that pertains to shipment status is AS1. This identifier is crucial in logistics and supply chain management, as it serves to track and manage shipment information effectively. Utilizing a standardized code such as AS1 allows logistics professionals to communicate shipment statuses clearly across different platforms and systems, ensuring that all parties involved have access to up-to-date information.

By using AS1, it becomes easier to retrieve specific details about the status of a shipment, including its location, estimated arrival times, and any potential delays. This enhances operational efficiency and helps in planning subsequent logistics activities, such as inventory management and resource allocation.

On the other hand, the other options do not align with the commonly recognized identifiers for shipment status. Each identifier serves different purposes or is used in different contexts, but AS1 is specifically designated for tracking shipment statuses in logistics operations.