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SAE J2735-Draft-Rev18 [issued: 06-26-07]
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142 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
The productions of ASN.1 which follow shall be considered normative in nature. While the majority of the
normative content is reflected in the actual syntax of the ASN.1 some entries also have additional
statements in the ASN.1 comments which shall be considered to be normative as well. In addition, the
commentary provided with each entry may also provide additional normative restrictions on the proper use
of the entry which shall be followed. The XML productions follow directly from the ASN.1 specifications
and the same rules shall be applied.
8.1 Data Element: DE_Extent [ATIS]
Use: The spatial distance over which this message applies and should be presented to the driver. Under
certain conditions some messages may never be shown to the driver of a vehicle if they are short in
duration and other conflicting needs supercede the display until such time as the subject message is no
longer relevant.
ASN.1 Representation:
Extent ::= ENUMERATED {
useInstantlyOnly (0),
useFor3meters (1),
useFor10meters (2),
useFor50meters (3),
useFor100meters (4),
useFor500meters (5),
useFor1000meters (6),
useFor5000meters (7),
forever (255) -- very wide area
}
-- encode as a single byte
XML Representation:
<xs:simpleType name="Extent" >
<xs:annotation>
<xs:appinfo>
useInstantlyOnly (0)
useFor3meters (1)
useFor10meters (2)
useFor50meters (3)
useFor100meters (4)
useFor500meters (5)
useFor1000meters (6)
useFor5000meters (7)
forever (255) -- very wide area
</xs:appinfo>
<xs:documentation>
encode as a single byte
</xs:documentation>
</xs:annotation>
<xs:union>
<xs:simpleType>
<xs:restriction base="xs:unsignedInt">
<xs:minInclusive value="0"/>
<xs:maxInclusive value="255"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="useInstantlyOnly"/>
<xs:enumeration value="useFor3meters"/>
<xs:enumeration value="useFor10meters"/>
<xs:enumeration value="useFor50meters"/>
<xs:enumeration value="useFor100meters"/>
<xs:enumeration value="useFor500meters"/>
<xs:enumeration value="useFor1000meters"/>
<xs:enumeration value="useFor5000meters"/>