Identifying control number that must be unique within the transaction set functional group assigned by the originator for a transaction set

Identifier of a particular data element in a particular segment. Composition of Reference Designator: First two or three characters - Segment ID. Last two characters - Numerical sequence of the Data Element in the Segment when all Data Element positions in the segment are used.

Contents of data element field in error (up to first 12 characters).

Prefix or alphabetic part of an equipment unit's identifying number.

Sequencing or serial part of an equipment unit's identifying number (pure numeric form for equipment number is preferred).

Code qualifying the Reference Number.

Reference number or identification number as defined for a particular Transaction Set, or as specified by the Reference Number Qualifier.

Code indicating application error condition.

Code indicating accept or reject condition based on the syntax editing of the transaction set.