W3C home > Mailing lists > Public > www-ws-desc@w3.org > February 2002

Another use case

From: FABLET Youenn <fablet@crf.canon.fr>
Date: Thu, 28 Feb 2002 09:09:29 +0100
Message-ID: <3C7DE5B9.8070309@crf.canon.fr>
To: www-ws-desc@w3.org

here is another use case scenario.

A webcam is plugged in to a network. This webcam can describe its 
services through a pre-loaded WSDL file.
I think it is important to keep in mind that WSDL files may be published 
by such devices (where space is valuable and/or read-only) as well as by 
big servers.
It should also be possible for a user to contact the webcam and get its 
WSDL description. Should we make a standard way to retrieve from  a web 
service its description (like making an HTTP get request to an HTTP web 
service will trigger the web service to send its description)? Is it let 
to a higher level ?

Then, a user sends through the network an HTTP request to get the video.
The webcam answers to this request by streaming the video to the user.
The user sends another request to stop the streaming.

I think WSDL should provide a way to express that it will use streaming 
at some point.
Streaming might be used at two levels:
   - at the protocol level : the service may  transmit the result by 
   - at the datatype level : the service may indicate that it will 
receive/send streaming as input/output.

Received on Thursday, 28 February 2002 03:11:39 UTC

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