The graphic depicts the SOAP and Attachment parts of a message.
In the graphic, a block labeled SOAP Part encloses another block labeled Envelope. Within the Envelope block are two blocks labeled Header and Body. Within the Header block is a sub-block labeled Header. Within the Body block is a sub-block labeled XML Content or Fault. Following the SOAP Part block are two blocks labeled Attachment Part. Each of these blocks contain two sub-blocks labeled MIME Headers and Content (XML or non-XML).