The document provided, https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-5/Enterprise-Mobility-8-5-Design-Guide/Enterprise_Mobility_8-5_Deployment_Guide/ch5_QoS.html, specifically mentions the version 8.5, which is related to the Cisco wireless controller and is relevant to the problem description of QoS policy and DSCP marking on wireless SSID.
The software version 8.5 is the one discussed in the context of Cisco wireless controller documentation provided.