This is a bug fix to release 4.1.0.

  • Aggregate functions (MIN, MAX, AVG, COUNT etc) no longer generate an internal exception.
  • Minor improvements to the installation documentation.


This is the first release of ICAT4 which is meant to be approaching production quality.

  • More changes to the API - too numerous to list here providing
    • support for pluggable authn,
    • support for rule based authz,
    • support for notifications and
    • a powerful search mechanism
  • Database independent
  • More regular schema with simple provenance mechanism


Technology preview release - not for production use

  • Many changes to the API


  • Changed the JPA provider from TopLink to EclipseLink
  • Removed Dataportal from the installation


Public release