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SAE J2735-Draft-Rev15 [issued: 01-30-07]
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
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 
<ASN> <XML>, and
DF 
In addition, this item may be used by data structures in other ITS standards.
6.6 Data Frame: DF_DDate
Use: The DSRC style date is a compound value consisting of finite-length sequences of integers (not characters) of
the form: "yyyy, mm, dd" -  as defined below.  Because the length of each element is known, no inner element
tagging is normally used in transmission.  Thus, this data frame occupies 4 bytes in total.
ASN.1 Representation:
DDate ::= SEQUENCE {
   year    DYear,            -- 2 bytes
   month   DMonth,           -- 1 byte
   day     DDay              -- 1 byte
   }
XML Representation:
<xs:complexType name="DDate" >
      <xs:sequence>
         <xs:element name="year" type="DYear" />
         <!-- 2 bytes -->
         <xs:element name="month" type="DMonth" />
         <!-- 1 byte -->
         <xs:element name="day" type="DDay" />
         <!-- 1 byte -->
      </xs:sequence>
</xs:complexType>
Used by: This entry is used directly by one other data structure in this standard, a DF called DF_ValueList <ASN>
<XML>.   In addition, this item may be used by data structures in other ITS standards.
6.7 Data Frame: DF_DDateTime
Use: The DSRC style date is a compound value consisting of finite-length sequences of integers (not characters) of
the form: "yyyy, mm, dd, hh, mm, ss (sss+)" -  as defined below.  Because the length of each element is known,
no inner element tagging is normally used in transmission.  Thus, this data frame occupies 8 bytes in total.  
ASN.1 Representation:
DDateTime ::= SEQUENCE {
   year    DYear,            -- 2 bytes
   month   DMonth,           -- 1 byte
   day     DDay,             -- 1 byte
   hour    DHour,            -- 1 byte
   minute  DMinute,          -- 1 byte
   second  DSecond           -- 2 bytes
   }
XML Representation:
<xs:complexType name="DDateTime" >
      <xs:sequence>
         <xs:element name="year" type="DYear" />
         <!-- 2 bytes -->
         <xs:element name="month" type="DMonth" />
         <!-- 1 byte -->
         <xs:element name="day" type="DDay" />
         <!-- 1 byte -->
         <xs:element name="hour" type="DHour" />
         <!-- 1 byte -->