kindly check the following links
https://developer.cisco.com/site/networking/security/identity-services-engine/overview/
http://www.cisco.com/c/en/us/td/docs/security/ise/1-2/api_ref_guide/api_ref_book/ise_api_ref_ers1.html#30233
http://www.cisco.com/c/en/us/td/docs/security/ise/1-2/api_ref_guide/api_ref_book/ise_api_ref_pref.html#pgfId-1024079