Updated documentation on encoding. Added optional field constellationXmf field …

…in GnssDataOutput.  This is to fix the encoding issue ILP-220.

@@ -65,9 +65,9 @@
 
               <elem name="encoding" multiplicity="0..1" type="EncodingFormat" default="0">
                   <comment>
-                      ConstellationData encoding format for the response. This field is carried into
-                      GnssDataOutput.encoding and GnssDataOutput.conData will be encoded
-                      in this format.  If not specified the "native" format of the protocol is used.
+                      ConstellationData encoding format for the response. The default encoding is natural, which will
+                      result in constellation data being returned in the "constellationData" field specified in the GnssDataOutput structure.  If the
+                      encoding value is 2 (XMF) or greater than 255 (custom encoding), then the data is returned in the "constellationXmf" field.
                   </comment>
               </elem>
 
@@ -97,17 +97,24 @@
 
             <elem name="encoding" multiplicity="0..1" type="EncodingFormat" default="0">
                 <comment>
-                    Constellation Data encoding format. Data can be provided in a different encoding format
-                    than the native protocol format.  This is carried over from input.
-                    If not present, the data is in the native protocol format (e.g. XMF, JSON).
+                    Constellation Data encoding format. If encoding is default (natural),  constellation data will be returned to caller in the constellationData field.
+                    If a value of 2(xmf) or greater than 255, constellation data will be returned in the constellation XMF field.
                 </comment>
             </elem>
 
-            <elem name="constellationData" multiplicity="0..*" type ="HPE.Gnss.ConstellationData" encoding="encoding">
+            <elem name="constellationData" multiplicity="0..*" type ="HPE.Gnss.ConstellationData" >
                 <comment>
                     The list of ConstellationData encoded in the format specified by encoding.
                 </comment>
             </elem>
+            
+            <elem name="constellationXmf" multiplicity="0..*" type ="xmf" >
+                <comment>
+                    XMF formated constellation with the specified encoding format.  If encoding is 2 (XMF) or greater than 255, then constellation data will be returned
+                    in as XMF or encoded XMF.
+                </comment>
+            </elem>            
+            
         </struct>