I am going through some material on implementing Ess/MSS in SAP ERP HCM and it somwhere says as the Service Key. For e.g. the Service KEy for Personal Dat aiView is EMPLOYEE_PERSINFO_PERSDATA05. Is this servie key is some backend table service where the data has been stored? And can I call this service key EMPLOYEE_PERSINFO_PERSDATA05 in some other application...say WD application if it's BAPI/RFC?
Please clarify this doubht..that will be really helpful.