2019-07-12 Freebusy Read URL V1.0 (CD 0903) CC/S 0903:2009 pubdocs/CD0903%20Freebusy%20Read%20URL%20V1.0.pdf 2009-04-15 This document, developed by the Freebusy Technical Committee, defines a standardized form of Freebusy read URL to improve interoperability between client and server implementations, while extending the functionality and utility through the use of optional parameters. published FREEBUSY