This document details the philosophy for choosing bibliographic records to link holdings and to create ephemeral records. Use existing records to facilitate circulation and placing a hold. Avoid adding duplicate bibliographic records which complicate searching for items. The library that adds an ephemeral record as a temporary record will pay to have a full MARC record added to replace it. These do not require a new record.
Title needs to match.
This does not require a separate record. With adult fiction classics, there are many different printings, some include forewards, introductions, historical notes, a few pages of illustrations, etc. Unless it's certain there's a difference in the text of the book, these do not need to match. Large print edition requires a separate record. Children's fiction Title needs to match.