|     SAE J2735-Draft-Rev26 [issued: 09-18-08]   -  221 -  This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.  transmission order are considered, messages with this level of priority shall be given precedence.  The  remaining 6 levels shall be used as determined by local conventions.  ASN.1 Representation:    Priority ::= INTEGER (0..255)      -- Follow definition notes on setting these bits  XML Representation:          <xs:annotation>           <xs:documentation>                     Follow definition notes on setting these bits           </xs:documentation>        </xs:annotation>        <xs:restriction base="xs:unsignedByte"/>  </xs:simpleType>  Used By:  This entry is used directly by one other data structure in this standard, a MSG called  MSG_RoadSideAlert <ASN> <XML>.   In addition, this item may be used by data structures in other  ITS standards.  Remarks:  Note that a well chosen roadway with a set of priority schemes chosen to be very well managed  can be thrown into chaos when an incident event occurs in it and when emergency response equipment  enters the transmission zone during the response to the event. Local agreements on practices, including  road side unit (RSU) placement, will be needed to insure correct operation.  8.8 Data Element: DE_Speed [ATIS]  Use:  Need to define.  ASN.1 Representation:    Speed ::= INTEGER (0..100) -- edit to proper ranges  XML Representation:    <xs:simpleType name="Speed" >        <xs:annotation>           <xs:documentation>                     edit to proper ranges           </xs:documentation>        </xs:annotation>        <xs:restriction base="xs:unsignedByte">           <xs:maxInclusive value="100"/>        </xs:restriction>  </xs:simpleType>  Used By:  This entry is directly used by the following 4 other data structures in this standard (record type,  descriptive name, ASN.1, and XML name (if present) of each):  DF   DF   DF   MSG   In addition, this item may be used by data structures in other ITS standards.  8.9 Data Element: DE_HorizontalDatum:cd [LRMS]  Use:  The underlying horizontal geodetic datum for a geographic coordinate.  ASN.1 Representation:    HorizontalDatum ::= ENUMERATED {wgs-84           (0),    wgs-84egm-96     (1),   |