Reboot-scheduler-datamodel is a project mainly written in ..., it's free.
The openacs postgresql datamodel of the scheduler of the reboot software for free radios. Hosted on github for historic and documentation purposes
The datamodel of the scheduler for the reboot radio software.
It contains a lot of openacs specific elements that don't make a lot of sense without an understanding of the openacs internals, please try to read over it. Also a lot of functionality of the overall system is not reflected in this datamodel because it is supported by standard mechanisms of the openacs framework, especially user and permissions management.
The most relevant part of these files is in radio-programs-create.sql
radio-recurring-create.sql contains the datamodel to store recurring time specifications (e.g. "every thursday 18:00-19:00", or "every 2nd and 4th wednesday of the month 12:00-14:00"), which are both used by programs and by containers.
radio-containers-create.sql defines the containers - which are recurring time frames that are used to divide areas of responsibility between different editorial groups of the radio.
Feel free to contact me if there are any questions.