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SAE J2735-Draft-Rev28 [issued: 11-10-08]
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221 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
8. External Data Entries
Data entries specified in Clauses 6 and 7 are also composed of message elements defined by other
standards bodies. These "foreign" elements are defined in the sections which follow. These definitions
were taken from the then-current adopted standards of these organizations when possible, and from the best
available sources when not. The referenced standards shall be consulted for further information regarding
their proper use. Unless otherwise noted in each entry, the below ASN.1 and XML definitions shall be
taken as the governing definition when used in this standard, even when a more current standard is adopted
by the issuing organization. Deployment needs to approach the elements in this section with caution as
they are subject to change and can be difficult to coordinate. It is important that the deployment have a
firm grasp of the definitions to be used in this area. When changes and improvements are made, ensure that
all parties are involved and coordinated.
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_Direction [ATIS]
Use: A set of compass point directions taken from the ITIS code list range (7998..8005).
ASN.1 Representation:
CompassDirection ::= ENUMERATED {
north (7998),
south (7999),
east (8000),
west (8001),
northeast (8002),
northwest (8003),
southeast (8004),
southwest (8005)
} -- Compass Points
XML Representation:
<xs:simpleType name="CompassDirection" >
<xs:annotation>
<xs:appinfo>
north (7998)
south (7999)
east (8000)
west (8001)
northeast (8002)
northwest (8003)
southeast (8004)
southwest (8005)
</xs:appinfo>
<xs:documentation>
Compass Points
</xs:documentation>
</xs:annotation>
<xs:union>
<xs:simpleType>
<xs:restriction base="xs:unsignedInt">
<xs:minInclusive value="7998"/>
<xs:maxInclusive value="8005"/>
</xs:restriction>