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Working Groups

Interest Groups

InterOpMay2004 Grid and Web Services

Participants

Timetable

Tuesday May 25, 2004

Friday May 28, 2004

Materials and notes from the work group and plenary sessions

Asynchronicity

Materials

• AsynchronousActivityProposal
• PowerPoint slides from Tuesday session

Resolutions

• This proposal to be developed further.
• Use of WS-RF is acceptable.
• WS-BaseNotification should be optional.

Issues

• Does WS-BaseNotification do reliable messaging? Does it need to?
• Need some WS-RF prototypes.

Actions

• Find out if WS-BaseNotification has reliable-messaging semantics (GuyRixon).

VObs Support Interfaces (originally called "Standard interfaces")

Materials

• V0.1 of specification
• Possible WSDL for v0.1
• Possible XSD for v0.1
• PowerPoint slides from Tuesday session

Resolutions

• Renamed from "standard interfaces" to "VObs support interfaces".
• All three port-types to be specified.
• getRegistration (was getMetadata, now renamed) to be optional.
• getAvailability (a.k.a. "heartbeat") to be mandatory.
• harvestLog to be optional.
• Progress to concrete design (WSDL, XSD, prototypes) ASAP.

Actions

• Revise document to v0.2 with detail changes (WilliamOMullane)

Issues

• May need to apply access control to harvestLog
• Unclear if registries will actually use getRegistration.

Access control

Materials

• OASIS WS-Security standards (technical committee page)
• WS-I scenarios for web-service security
• SingleSignOnProposal
• PowerPoint slides from Tuesday session

Resolutions

• A SSO system based on digital signature and WS-Security is basically suitable for the IVO.
• Use of community services (run by real-world, astronomical communities) is a good way to manage users.
• Split the current proposal into two IVOA documents: (1) wire protocol; (2) Public Key Infrastructure/community services.
• Only community services for authentication should be tackled now. Community authorization is separate and might not be required.
• We need to understand the technology better before deploying it.

Issues

• Is WS-Security compatible with "Shibboleth"?
• Is WS-Security compatible with grid services/portals?
• Will service providers acccept our SSO arrangements?
• Can we handle 100+ communities? Do we expect that many?
• How do we prevent spoofing of community services (allows stealing of passwords)?
• How do we delegate work from one service to another?

Actions

• Check compatibility of WS-Security with other systems (GuyRixon)

SOAP interoperability

Materials

• WS-I Basic Profile 1.0
• A few words about the WS-I Basic Profile

Resolutions

• We adopt WS-I conformance as a goal, subject to support from our web-service toolkits.

Actions

• Collect existing conformance-reports for web-service toolkits (AndreSchaaff).
• Arrange testing programmes for implementations of IVOA services (AndreSchaaff)
• Collect and publish conformance reports donated by IVOA members (AndreSchaaff).

Issues

• Axis v1.1 may be too non-conformant to use; might need to adopt Axis v1.2 beta before its final release.

Distributed storage

Resolutions

• This is now a work package for GWS-WG.
• Aim for a common, standard facade to existing storage systems (MyDB, MySpace, SRB, etc.)

Actions

• Produce a technical proposal (David Morris, WilliamOMullane)

Attachment	Action	Size	Date	Uploaded by	Comment
VObsService.wsdl	manage	2.2 K	13 May 2004 - 11:02	GuyRixon	WSDL for standard-interfaces specification
StandardInterfaces-0.1.pdf	manage	57.3 K	13 May 2004 - 11:04	GuyRixon	Standard interfaces proposed specification
availability.xsd	manage	1.1 K	13 May 2004 - 11:15	GuyRixon	XSD for standard-interfaces specification
STDIFboston.ppt	manage	619.0 K	24 May 2004 - 16:14	WilliamOMullane	Slides for Standard Interfaces
sso-ivoa-interop-may-2004.ppt	manage	307.0 K	27 May 2004 - 22:55	GuyRixon	Presentation on single sign-on
async-activity-ivoa-may-2004.ppt	manage	239.5 K	27 May 2004 - 22:56	GuyRixon	Presentation on asynchronous activities
WordsAbout-WS-I-BP.pdf	manage	681.5 K	28 May 2004 - 13:21	AndreSchaaff	A few words about the WS-I Basic Profile