[ FOR { BROWSE | <XML> } ]

    <XML> ::=
      XML
      {
        { RAW [ ('ElementName') ] | AUTO }
        [
          <CommonDirectives>
          [ , { XMLDATA | XMLSCHEMA [ ( TargetNameSpaceURI ) ]} ]
          [ , ELEMENTS [ XSINIL | ABSENT ]
        ]
        | EXPLICIT
          [
            <CommonDirectives>
            [ , XMLDATA ]
          ]
        | PATH [ ('ElementName') ]
          [
            <CommonDirectives>
            [ , ELEMENTS [ XSINIL | ABSENT ] ]
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     <CommonDirectives> ::=
       [ , BINARY BASE64 ]
       [ , TYPE ]
       [ , ROOT [ ('RootName') ] ]
       
"A dialog is a conversation between two services. Dialogs use the message conversation identifier and sequence number to identify related messages and put them in the correct order. In this way, dialogs provide exactly-once-in-order message delivery. The initiator begins a dialog, and the target accepts the conversation started by the initiator."

"20.1. Before You Begin"