I was trying to write a validation rule , but it is not reflecting which i expected. please help there is a picklist field having 6 values namely active, processing, accepted,rejected, Admitted, discharge. once these picklist value has been saved as admitted we need to lock down this value for all users except system admin user.
I have been struck for the below validation rule.
AND(PRIORVALUE(Status) = "Admitted",NOT($User.Id = "005P00000015Vvm"),ISCHANGED(Status))
Thanks in advance.

Any one can suggest any PDF or Example on Web Services and Salesforce Integration?
i am going through few PDF's and links but not able to get hands on practise  properly how to use SOAP, REST,WSDL step by step?
Is any Practical example step by step?