A MARC XML record set is a XML file that contains multiple book records. The record data is presented in MARC XML format. Here's what a sample record looks like that contains just 1 record: MARC XML.
The NNELS system only understands metadata in MARC XML format, so you'll need to convert any metadata into this format.
How we create the MARC XML record set depends on how the metadata is provided to us by publishers/suppliers. Publishers usually supply us with metadata in one of 3 formats: ONIX, MARC 21, and Excel.
To learn how to convert these formats into MARC XML, follow the links below. You'll need to download MarcEdit.