The IMS Global Learning Consortium develops and promotes the adoption of open technical specifications for interoperable learning technology. Several IMS specifications have become worldwide de facto standards for delivering learning products and services. IMS specifications and related publications are made available to the public from www.imsglobal.org.
Plone is a user-friendly powerful content management system - ideal as an intranet and extranet server, as a document publishing system, a portal server and as a groupware tool for collaboration between separately located entities.
R. Agrawal, B. Golshan, and E. Terzi. Proceedings of the 20th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 1017--1026. New York, NY, USA, ACM, (2014)
A. Ajalloeian, M. Vlachos, J. Schneider, and A. Steinmann. Proceedings of the 31st ACM International Conference on Information &$\mathsemicolon$ Knowledge Management, page 2853-2862. ACM, (October 2022)Very interesting case of recommendations. Music to play... Need to have skill level and also same music could be recommended many times....
M. Amelung, P. Forbig, and D. Rösner. ITiCSE '08: Proceedings of the 13th annual SIGCSE conference on Innovation and technology in computer science education, New York, NY. USA, ACM Press, (2008)