What does sequence number of a line item in a transaction mean

AI generated answer (using internal Slack threads):

In NetSuite, the sequence number of a line item in a transaction refers to the internal sequence number stored for each transaction line according to the line item’s position in the sublist. This sequence number is used by the nlobjSublist methods

setLineItemValue(name, linenum, value)

and

getLineItemValue(group, fldnam, linenum)

. It's important to note that the sequence number is not the same as the Line ID. The Line ID is a unique identifier given to each line item when it is created and does not change until the line is removed, regardless of the operations performed on it (e.g., editing the line, inserting a line item above). If a line item is removed and another line item is inserted to replace it, the new line item will have a different Line ID, but the same Line Sequence Number. When adding a new item to an existing sales order, you typically do not need to specify the Line ID. If left unmapped, NetSuite will append your lines to the existing document. Please note that the sequence number does not 'reset' if lines are removed. Therefore, the first item within the item sublist on a transaction may not necessarily start with 1. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******