When our users place a document delivery request or another library places a borrowing request for one of our items the system can look at System Control Number which includes OCLC number. This is good. If user has an OCLC it helps to ensure we are pulling the exact right item. But this includes anything in the 035 field. Currently we have the bib numbers from our previous system in the 035 which is standard practice. The system is matching on this number. This causes confusion and delays with requests. It would be helpful to be able to configure it so it only looks at the OCLC number in the 035 or at least allow the library to configure for themselves what data in that field should be looked at.