From: Farrell, Lee (Lee.Farrell@cda.canon.com)
Date: Fri Mar 23 2007 - 17:45:36 EDT
Hello everyone,
At our face-to-face meeting, I was assigned to investigate whether or
not WS-Devices would be a possible consideration for supporting
Projector & Display Management.
The short answer: It appears that it could be.
According to the local expert at my company, WS-Devices is primarily a
"framework" for web services on devices. This framework would support
the discovery of devices that [could have] support for management
services.
[Actually, it seems that the specification is actually called "Device
Profile for Web Services" (DPWS). Microsoft uses the term Web Services
on Devices for its implementation of the DPWS.]
The Device Profile for Web Services described by Microsoft at
http://www.microsoft.com/whdc/rally/rallywsd.mspx "... specifies a
lightweight subset of the overall Web services protocol suite that is
appropriate for network-connected devices. The Devices Profile
prescribes how to use elements of core Web services specifications to
enable these functions:
* Send more secure messages to and from a Web service
* Dynamically discover a Web service
* Describe a Web service
* Subscribe to, and receive events from, a Web service"
So the real issue is that the specific Web Service(s) which would
support the desired device management (and alert notification) functions
would need to be defined first. Then, WS-Devices could be used to
discover the service, describe the service, subscribe to the service,
and receive events from the service.
Does this help?
Reference:
http://specs.xmlsoap.org/ws/2006/02/devprof/devicesprofile.pdf
Lee
===========================
Lee Farrell
Canon Development Americas
15975 Alton Parkway
Irvine, CA 92618-3731
(949) 932-3163 - voice
(949) 932-3520 - fax
lee.farrell@cda.canon.com
===========================
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