NVC documentation receipt notations

It's always great to hear from the NVC when they state that all required docs have been received and the case is ready for the next step. In the case of Immigrant Visa applications, it's an interview at the US embassy or general consulate. What I find a bit confusing is the notations the NVC uses to essentially denote the same status with slight variations.

For example, to indicate that a document has been received, the NVC uses the following:

• D= certified document received
• O= original document received and accepted as meeting post requirements
• S= scanned document received. Original document must be presented at time of interview.
• Y= the required document has been received.

I appreciate the detail that these notations provide, but there must be an easier way to convey this information. Hopefully the NVC will streamline this process and make it easier to work with.