When an institution moves from an old system to OLE, it is likely that they have continuation orders for subscriptions and other open orders that haven't been fulfilled yet. It is important to transfer such data to OLE for continuous tracking and record keeping.
This can be achieved in OLE through the Batch Process - Order Record Import. Since multiple tables are involved it is not advised to carry out this operation through direct inserts on the back end.
The Order Record Import process either accepts a MARC file as input file or a combination of MARC and EDI files, where MARC contains the Bib related information and EDI contains Vendor related information.
Technical Information on Order Record Import Batch Process can be found here.