PPDM : Understand Relation between /api/v2/activities and /api/v2/protection-details

Hi All

I am trying to use the Dell EMC PPDM REST API and have below questions. Kindly advise.

• I need help to understand relation between  /api/v2/activities and /api/v2/protection-details. Which attribute in the schema would help me the relate the activity and its protection detail?
• What is difference between assetHistoryId and assetId in /api/v2/protection-details?
• Is copyId same as backupId?