HP HPE VAN SDN Controller 2.7 Administrator's Manual page 218

Example 10 Lists primary tags associated with a specific application
Curl equivalent command
curl --noproxy <controller_ip> -X GET --header
"X-Auth-Token:<token>" --fail -ksSfL --url
"https://<controller_ip>:8443/sdn/v2.0/metrics/apps/<app_id>/primaries"
Curl output for app_id=com.hp.sdn
{"primaries":["jvm"]}
Result
The only primary tag associated with the controller is jvm.
218 Examples of Metrics