SOAP version 1.2 in a nutshell
  - SOAP message:
    
      - Envelope: XML document
 
      - Composed of a header and a body
        

        
       
    
   
  - Processing model
 
  - Sent from a sender to a receiver, possibly via intermediaries
 
  - Headers:
    
      - Can be addressed to certain intermediaries
 
      - Can be marked as mandatory
 
    
   
  - Can be transfered from one node to another any underlying protocol
    (e.g. HTTP)