ILP-301 Added WirelineFormat and InteractionRole XID ENUM Specifications. Provi…

…ding these enable use in conduit implementations.  Not required but helpful.

@@ -41,5 +41,23 @@
         <elem name="reserved" type="Tensor.uint16" multiplicity="1" ord="64"/>
       </struct>     
       
+      <enum name="WirelineFormat" type="Tensor.uint8" default="undefined">
+          <comment>Enum defines the wireline data format of XID interactions.  These are defined to facilitate standard definitions within XID interactions independent of the 
+          specific transport protocol or XID conduit.</comment>
+          <literal name ="undefined" value = "0"/>
+          <literal name ="binary" value = "1"/>
+          <literal name ="base64" value = "2"/>
+          <literal name ="hex" value = "3"/>          
+      </enum>
+      
+      <enum name="InteractionRole" type="Tensor.uint8" default="undefined">
+          <comment>InteractionRole defines the role of the conduit in a XID interaction.
+		    A Conduit port must adopt either the target or initiator role to preserve
+		    interaction continuity and conventions.</comment>
+          <literal name ="undefined" value = "0"/>
+          <literal name ="target" value = "1"/>
+          <literal name ="initiator" value = "2"/>
+      </enum>      
+  
     </namespace>
 </specification>