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SAE J2735-Draft-Rev28 [issued: 11-10-08] 
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168 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
            <xs:restriction base="xs:unsignedInt">
               <xs:minInclusive value="0"/>
               <xs:maxInclusive value="15"/>
            </xs:restriction>
         </xs:simpleType>
         <xs:simpleType>
            <xs:restriction base="xs:string">
               <xs:enumeration value="noneActive"/>
               <xs:enumeration value="none"/>
               <xs:enumeration value="requested"/>
               <xs:enumeration value="active"/>
               <xs:enumeration value="activeButIhibitd"/>
               <xs:enumeration value="seccess"/>
               <xs:enumeration value="removed"/>
               <xs:enumeration value="clearFail"/>
               <xs:enumeration value="detectFail"/>
               <xs:enumeration value="detectClear"/>
               <xs:enumeration value="abort"/>
               <xs:enumeration value="delayTiming"/>
               <xs:enumeration value="extendTiming"/>
               <xs:enumeration value="preemptOverride"/>
               <xs:enumeration value="adaptiveOverride"/>
               <xs:enumeration value="reserved"/>
            </xs:restriction>
         </xs:simpleType >
         <xs:simpleType>
            <xs:restriction base="local:PriorityState" /> 
         </xs:simpleType>
      </xs:union>
</xs:simpleType>
In addition, this item may be used by data structures in other ITS standards.
Remarks: Used in the SignalState definition (a complex octet encoding). 
7.106 Data Element: DE_ProbeSegmentNumber
Use: The PSN enables users to identify vehicle trajectory for a limited amount of time or over a limited
distance.  It is randomly generated by a vehicle every 120 seconds or 1km, whichever comes last.  The
interval between PSN changes is a random number of seconds between 0 and 10s or a random distance
between 0 and 200m, whichever comes last.  When sending messages containing a PSN, each message
must contain a single PSN.  
For Example when using the PSN in a Probe Data snapshot, all snapshots contained within a single
message must contain the same PSN.  All remaining Snapshots with a PSN that has already been sent to an
RSE will be purged when the RSE communication link is broken.  Event based Snapshots will not contain a
PSN.
ASN.1 Representation:
ProbeSegmentNumber ::= INTEGER (0..32767)  
   -- value determined by local device
   -- as per standard
XML Representation:
<xs:simpleType name="ProbeSegmentNumber" >
      <xs:annotation>
         <xs:documentation>       
            value determined by local device
            as per standard
         </xs:documentation>
      </xs:annotation>
      <xs:restriction base="xs:unsignedShort">
         <xs:maxInclusive value="32767"/>
      </xs:restriction>
</xs:simpleType>