[Name] xmlns:[YourNameSpacePrefix] [Required] false [Default Value] none [Description] This returns a namespace identifying the contained message format. More than one xmlns attribute may be included. [Type] 
string
V a l u e e x p r e s s i o n
L o c a t i o n e x p r e s s i o n
s t r i n g
L i s t o f l o c a t i o n e x p r e s s i o n s