HTTP DELETE com.mycompany.myapp.Order|123/orderStatus
Request
body: empty
Request headers:
- If-Match: (value of timestamp)
- where timestamp is as obtained from object representation
Request validation only 
custom header "X-ValidateOnly": "true"
Response if the value is valid
modifies the value
returns: 200 ok
Response if the property was cleared
returns: 200
Response if the property was already clear
returns: 200
Response if the property cannot be cleared
returns: some sort of 4xx error
- Response 'Warning' header: error message
- ??? additionally, updated representation that has a message ???
Response if the value is invalid
- some sort of 4xx error
Response if object cannot be found
returns: 404
Response if the object has changed
returns: 409 "conflict"
header: "Last-Modified"
Update existing object with new values.