属性
数据类型N
必须?Mandatory
长度Min 0 / Max 2
Element
X12 EDI Release 00401
AK4
722Element Position in Segment
This is used to indicate the relative position of a simple data element, or the relative position of a composite data structure with the relative position of the component within the composite data structure, in error; in the data segment the count starts with 1 for the simple data element or composite data structure immediately following the segment ID
