In Standard edition there is no specific backup framework for integration of 3rd party backup solutions as such; however the Citrix Hypervisor API allows for scripting (e.g. utilizing Snapshots) and basic integration with 3rd party backup products and scripting e.g. PHD backup
Product :
Citrix, Citrix Hypervisor/8, Standard
Feature :
Backup Integration API, Updates and Backup, Management