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SAE J2735-Draft-Rev18 [issued: 06-26-07] 
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
            <xs:restriction base="xs:string">
               <xs:enumeration value="notEquipped"/>
               <xs:enumeration value="off"/>
               <xs:enumeration value="on"/>
               <xs:enumeration value="engaged"/>
            </xs:restriction>
         </xs:simpleType >
      </xs:union>
</xs:simpleType>
Used by: This entry is directly used by the following 3 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF 
<XML>, and
DF 
<XML>, and
DF 
In addition, this item may be used by data structures in other ITS standards.
7.6 Data Element: DE_ApproachNumber
Use: The ApproachNumber data concept coveys a unique index value for an approach or an egress in an
intersection.  Used to refer to that approach by other objects in the <need a general name> intersection map
data structure.   Note: we will have some problems if people combine the intersection number and the
approach number and expect this to be unique, as it will conflict with people doing the same thing with the
lane values.  Maybe we re-think this and use a naming tree of intersectionID - appoachNumber -
laneNumber as the full path format.  The actual use and need for this value is not clear to me at this time.
ASN.1 Representation:
ApproachNumber ::= INTEGER (0..255)
XML Representation:
<xs:simpleType name="ApproachNumber" >
      <xs:restriction base="xs:unsignedByte"/>
</xs:simpleType>
Used by: This entry is directly used by the following 2 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF 
<XML>, and
DF 
In addition, this item may be used by data structures in other ITS standards.
7.7 Data Element: DE_BrakeAppliedPressure
Use: The applied pressure of the vehicle brake system.
ASN.1 Representation:
BrakeAppliedPressure ::= ENUMERATED {
   notEquipped  (0),  -- B'0000 Not Equipped
   minPressure  (1),  -- B'0001 Minimum Braking Pressure
   bkLvl-2      (2),  -- B'0010
   bkLvl-3      (3),  -- B'0011   
   bkLvl-4      (4),  -- B'0100  
   bkLvl-5      (5),  -- B'0101
   bkLvl-6      (6),  -- B'0110
   bkLvl-7      (7),  -- B'0111
   bkLvl-8      (8),  -- B'1000
   bkLvl-9      (9),  -- B'1001
   bkLvl-10     (10), -- B'1010
   bkLvl-11     (11), -- B'1011