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SAE J2735-Draft-Rev29 [issued: 12-11-08] 
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149 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
      </xs:annotation>
      <xs:restriction base="xs:unsignedByte">
         <xs:maxInclusive value="127"/>
      </xs:restriction>
</xs:simpleType>
Used By: This entry is used directly by one other data structure in this standard, a DF called
DF_RoadSignID <ASN> <XML>.   In addition, this item may be used by data structures in other ITS
standards.
Remarks: If sent, a value of zero shall be used (for "generic sign") until further definitions are provided.
7.88 Data Element: DE_NEMA_Revision
Use: The specific revision of the NMEA standard which is being used (if present). This is needed to know
precisely the mapping of the messages types to their definitions, as well as some minor transport layer
ordering details when received in the mobile unit.  
ASN.1 Representation:
NMEA-Revision ::= ENUMERATED {
     unknown       (0), 
     reserved      (1),
   
     -- to be determined
   
     ... -- # LOCAL_CONTENT
     } 
     -- values to 127 reserved for std use
     -- values 128 to 255 reserved for local use
XML Representation:
<xs:simpleType name="NMEA-Revision" >
      <xs:annotation>
         <xs:appinfo>
            unknown (0)
            reserved (1) -- to be determined
         </xs:appinfo>
         <xs:documentation>       
            values to 127 reserved for std use
            values 128 to 255 reserved for local use
         </xs:documentation>
      </xs:annotation>
      <xs:union>
         <xs:simpleType>
            <xs:restriction base="xs:unsignedInt">
               <xs:minInclusive value="0"/>
               <xs:maxInclusive value="1"/>
            </xs:restriction>
         </xs:simpleType>
         <xs:simpleType>
            <xs:restriction base="xs:string">
               <xs:enumeration value="unknown"/>
               <xs:enumeration value="reserved"/>
            </xs:restriction>
         </xs:simpleType >
         <xs:simpleType>
            <xs:restriction base="local:NMEA-Revision" /> 
         </xs:simpleType>
      </xs:union>
</xs:simpleType>
Used By: This entry is used directly by one other data structure in this standard, a MSG called
MSG_NMEA_Corrections <ASN> <XML>.   In addition, this item may be used by data structures in
other ITS standards.