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SAE J2735-Draft-Rev26 [issued: 09-18-08] 
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34 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
         defined in the revision being used
         NOTE as the message type is also in the payload,
         we may want to remove it from here,  not sure right now. DCK -->
         <xs:element name="wdCount" >
            <xs:simpleType>
               <xs:restriction base="xs:unsignedShort">
                  <xs:maxInclusive value="1023"/>
               </xs:restriction>
            </xs:simpleType>
         </xs:element>
         <!-- a count of bytes to follow -->
         <xs:element name="payload" type="NMEA-Payload" />
      </xs:sequence>
</xs:complexType>
In addition, this item may be used by data structures in other ITS standards.
Remarks: Need to sync this up with a similar message already present in the IEEE 1512 work so they
match.  
5.9 Message: MSG_ProbeDataManagement  (need rework to match data setting)
Use: Taken at a defined snapshot event to define RSU coverage patterns such as the moment an OBU joins
or becomes associated with an RSU and can send probe data.
ASN.1 Representation:
ProbeDataManagement ::= SEQUENCE {
   msgID                DSRCmsgID,        -- This is a unique message 
                                          -- identifier, NOT related to 
                                          -- the PSID\PSC
   sample               Sample,           -- identifies vehicle  
                                          -- population affected
   directions           HeadingSlice,       
                                          -- Applicable headings/directions
   term CHOICE {                          
      termtime          TermTime,         -- Terminate management process 
                                          -- based on Time-to-Live
      termDistance      TermDistance      -- Terminate management process 
                                          -- based on Distance-to-Live
      },
   snapshot CHOICE {
      snapshotTime      SnapshotTime,     -- Collect snapshots based on time
      snapshotDistance  SnapshotDistance  -- Collect snapshots based on Distance
      },
   txInterval           TxTime,           -- Time Interval at which to send snapshots
   cntTthreshold        INTEGER (1..32),  -- number of thresholds that will be changed
   dataElements SEQUENCE (SIZE(1..32)) OF 
                        VehicleStatus,  
                         -- rework above item to fit new needs
                                          -- new threshold (the object type is now 
                                          -- handled by the tagging)
   
   ...
   }
XML Representation:
<xs:element name="probeDataManagement" type="ProbeDataManagement"/>
<xs:complexType name="ProbeDataManagement" >
      <xs:sequence>
         <xs:element name="msgID" type="DSRCmsgID" />
         <!-- This is a unique message
         identifier,  NOT related to
         the PSID\PSC -->
         <xs:element name="sample" type="Sample" />
         <!-- identifies vehicle
         population affected -->
         <xs:element name="directions" type="HeadingSlice" />
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