COUNTER release 5 is scheduled to replace COUNTER release 4 by January 2019. In preparation for this change, Project COUNTER has issued The friendly guide to release 5 for librarians.
COUNTER release 5 represents a revision of the COUNTER code of practice to better reflect changing reporting needs. Types of reports have been simplified to both assist providers in becoming COUNTER compliant and provide librarians with "usage statistics that are credible, consistent and comparable." Page 19 of the guide provides a table comparing Release 5 reports with covered Release 4 reports. Several sample usage scenarios are provided.
The COUNTER code of practice provides consistent guidelines for
publishers reporting electronic resource usage, assisting librarians in
evaluation of their usage.