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SAE J2735-Draft-Rev26 [issued: 09-18-08]
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80 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
shall not be used to circumvent the structure of the messages. That said, this is an excellent way to add
further meta-data to a message or to add content which a local deployment feels is needed but, which is not
currently in the message set.
ASN.1 Representation:
Tail ::= SEQUENCE
{
entries SEQUENCE (SIZE (1..32)) OF SEQUENCE {
tag UTF8String (SIZE(1..20)),
value UTF8String (SIZE(1..200))
}
-- sets of addtional named data values
}
XML Representation:
<xs:complexType name="Tail">
<xs:sequence maxOccurs="32">
<xs:element name="entry">
<xs:complexType>
<xs:sequence>
<xs:element name="tag">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="value">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="200"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<!-- sets of addtional named data values -->
</xs:sequence>
</xs:complexType>
In addition, this item may be used by data structures in other ITS standards.
Remarks: When used in DSRC message to add "XML like" tagging then the delimiting values of "<" and
">" should appear in the tag and values strings. This is not required in message transmissions which contain
an explicit tagging system. If the tag and value string are to be expressed in XML added values of "<" or
">" shall be removed from the content.
6.48 Data Frame: DF_UpdateVector
Use: A minimal report of the vehicles position, speed, and heading. Used in the probe vehicle message as
one of the subsequent reports of position information (preceded by a longer frame with additional
information which does not vary).
ASN.1 Representation:
UpdateVector ::= SEQUENCE {
lastMin DMinute, -- 1 byte
lastSec DSecond, -- 2 bytes
lat Latitude, -- 4 bytes, 1/8th microdegree
heading Heading, -- 1 byte, 1.4 deg
speed Speed, -- 1 byte
elevation Elevation, -- 3 byte
... -- # LOCAL_CONTENT
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