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As part of the investigation of all relevant standards and technologies in the Vehicle Connected Services project, this is a brief summary of the current (2019-06-24) state of the W3C Automotive working group standard for Vehicle Services Interface specification  (formerly VISS), version 2.0.

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• Status/error codes (following HTTP standards)
• "The payload shall have JSON format."
• Two protocols noted so far: HTTPS (the main driver for VISS v2) and "Secure Websockets" (like VISSv1)
• Wildcards and Queries
• The HTTPS chapter includes examples how to access data in the described data tree, such as:

GET VSS-Root/Car/Drivetrain/InternalCombustionEngine/RPM HTTP/1.1

• ...and Wildcards:

/VSS-Root/Cabin/Door/*/*/IsLocked HTTP/1.1  

NOTE: Some discussions whether wildcards should be completely replaced by new Queries approach.

Note about current status:

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