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SAE J2735-Draft-Rev26 [issued: 09-18-08]
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238 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
In addition, this item may be used by data structures in other ITS standards.
8.28 Data Frame: EXT_Tail [ATIS]
Use: This data structure is a way to add pairs of names and associated values to a message. It typically
appears at the end of a message (hence the name tail). The value carried in this portion of the message
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:
TailSet ::= SEQUENCE {
set SEQUENCE {
name IA5String(SIZE(1..32)),
value IA5String(SIZE(1..10000))
-- any internal structure of the value string is the
-- responsibility of the data creator to manage. If the
-- content is binary, convert to bin hex strings.
}
-- the order of the sets shall not be changed
}
XML Representation:
<xs:complexType name="TailSet" >
<xs:sequence>
<xs:element name="set" >
<xs:complexType>
<xs:sequence>
<xs:element name="name" >
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="32"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="value" >
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="10000"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<!-- any internal structure of the value string is the
responsibility of the data creator to manage. If the
content is binary, convert to bin hex strings. -->
</xs:sequence>
</xs:complexType>
</xs:element>
<!-- the order of the sets shall not be changed -->
</xs:sequence>
</xs:complexType>
In addition, this item may be used by data structures in other ITS standards.
8.29 Data Element: EXT_VerticalDatum:cd [LRMS]
Use: The underlying vertical geodetic datum for a geographic coordinate.
ASN.1 Representation:
VerticalDatum ::= ENUMERATED { wgs-84 (0),
navd (1),
...} -- # LOCAL_CONTENT
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