I'm sorry that the 2008 version of CL is not available. The 2018 version has some complex extensions that nobody uses. The IKL extensions are simpler and more useful. Unfortunately, the 2018 ISO standard does not separate the extensions from the much simpler and more useful core. There were some debates about the usefulness of the different versions, Unfortunately, the other one became the official ISO standard. For the IKL extension and many related publications, see https://jfsowa.com/ikl/ John ---------------------------------------- From: "James Davenport' via ontolog-forum" <ontolog-forum(a)googlegroups.com> That page has gone, and is replaced by the 2018 version: https://standards.iso.org/ittf/PubliclyAvailableStandards/c066249_ISO_IEC_2… James Davenport Hebron & Medlock Professor of Information Technology, University of Bath National Teaching Fellow 2014; DSc (honoris causa) UVT Former Fulbright CyberSecurity Scholar (at New York University) Former Vice-President and Academy Chair, British Computer Society