- From: Jonathan Marsh <jmarsh@microsoft.com>
- Date: Tue, 24 Aug 2004 12:11:08 -0700
- To: <www-ws-desc@w3.org>
Minutes, 2 August 2004 FTF, London Web Services Description Working Group Present: David Booth W3C Allen Brookes Rogue Wave Software Helen Chen Agfa-Gevaert N. V. Roberto Chinnici Sun Microsystems Glen Daniels Sonic Software Paul Downey British Telecommunications Youenn Fablet Canon Hugo Haas W3C Jacek Kopecky DERI Jonathan Marsh Chair (Microsoft) Jeff Mischkinsky Oracle David Orchard BEA Systems Bijan Parsia University of Maryland MIND Lab Arthur Ryman IBM Igor Sedukhin Computer Associates Asir Vedamuthu webMethods Observers: Anish Karmarkar Oracle Adrian Smith British Telecom Regrets: Ugo Corda SeeBeyond Martin Gudgin Microsoft Peter Madziak Agfa-Gevaert N. V. Jean-Jacques Moreau Canon Jeffrey Schlimmer Microsoft Prasad Yendluri webMethods, Inc. ------------------------------------------------------- 09:00 Introductions and logistics - Assignment of scribes Adi Sakala, Jacek Kopecky, Umit Yalcinalp, Mark Nottingham, Igor Sedukhin, Dale Moberg, David Orchard, Jerry Thrasher, Bijan Parsia, Asir Vedamuthu, Glen Daniels, Jeff Mischkinsky, Roberto Chinnici, Amy Lewis, Youenn Fablet Mon: Igor, GlenD Tue: DaveO, JeffM Wed: Asir, Jacek Scribe: Igor ------------------------------------------------------- - Agenda bashing DaveO: wants to talk about versioning DaveO: a client has no way of knowing when the new interface is deployed. has a proposal to discuss. Jonathan: 4 items in the free time bucket [ Property "required" Composition model Multiple namespaces and schemas Versioning ] Arthur: review formalizations in the spec. e.g. remove the ambiguities ------------------------------------------------------- 09:15 Last Call [2, 3, 4] Stuff - Any showstopping issues? - Last Call procedures (tracking issues, etc.) - Use ExIT? Jonathan has been using it for XInclude [5] - CR preparation - Encouraging implementations - Start thinking about CR exit criteria. [2] http://www.w3.org/2002/ws/desc/wsdl20 [3] http://www.w3.org/2002/ws/desc/wsdl20-patterns [4] http://www.w3.org/2002/ws/desc/wsdl20-bindings [5] http://www.w3.org/XML/2004/07/ExIT-xinclude/issues.html Glen: need to resolve HTTP application data binding as a reusable feature binding or part of the HTTP binding? Section 3.3 in part 2. A feature binding. <Roberto> http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0397.html DaveO: Amy&Umit are not here. Noone could argue for "part of HTTP binding" now. Jonathan: distinguishing between feature and feature-binding DaveO: one can look at the binding as the feature too... Glen: a B implements a fixed set of features. Any additional is just a feature. Jonathan: this is a feature that binds an abstract feature. So is it a feature binding or just a feature? DaveO: this was not part of any proposal yet Glen: make a one word change or define the term. the former is simpler to do before LC. Feature is not restricted to be abstract. It can modify behaviour of anything including concrete bindings. RESOLUTION: Change "feature-binding" to "feature". Jonathan: discuss part II. proposed that Glen to be added to part II editors. RESOLUTION: Glen appointed as part II editor Jonathan: going through part II edits. LC logistics. e.g. should we start new issues list... Glen: bugzilla? <asir> http://www.w3.org/XML/2004/06/scds-pre-lc-issues/ <asir> in the schema wg Glen: potential visions for the way forward and a way to get as much as possible done now (i.e. before October?) Talk about various possible outcomes when certain specs become available... Jonathan: how do we get through the issues... assign champions... 200 issues to go though before CR. Better to have short LC. Are we ok with 60 days... Hugo: what is the last date for LC (now Oct 4th). Jonathan: get comment, acknowledge, WG response Jacek: this may be too complicated for small editorial comments Jonathan: may help to separate: discussion -> positions and discussions around actual spec modifications. Get a wider internal review of LC. After LC -> CR... develop test suites... Jonathan: is there an AB rec how the test materials are handled... ...noone remembers... ACTION: Jonathan to followup on AB decisions with regards to test materials handling... Arthur: 1) WSDL->code 2) test messages Jonathan: for CR we may want to consider distingushing the applications that comply with WSDL DaveO: why don't we just run it via WS-I :) Glen: this is the exit criteria for W3C Paul: how high is the bar for CR? <jeffm> ws-i's IPR rules prohibit this WG doing anything formal with WS-I wrt testing - sigh :-( Paul: contribute test cases Jonathan: there are usually 2-3 big contributors instead of many Arthur: there is no point to rush to CR. Value of the spec will be greater if we can show that there are actually a number of interoperable impls. Arthur: implementations first instead of publish a spec and then find issues Jonathan: there could be some bug fixing period for implementers that may affect the CR then Glen: Axis -- months to get to the impl Paul: migration is a good test case. Jonathan: does not guarantee that all WSDL 2.0 features are tested that way Paul: it may be a subset, but it is very useful e.g. for BT Arthur: are there W3C guidelines on exit criteria Jonathan: there should be 2 interoperable impls, but even that is vague. 1) implementable 2) interoperable <pauld> http://www.w3.org/QA/ Anish: isn't there a QA working group... Jonathan: QA may point to examples, but they don't actually implement WSDL-specific things Jonathan: QA verifies a check list for specs <pauld> QA Test Guidelines:http://www.w3.org/TR/2004/WD-qaframe-test-20040225/ Hugo: at CR have an interop F2F Jonathan: January?... WG: there won't be much done by then Hugo: our schedule Jan/March proposed REC... DaveO: what are the potential "bars"... Jonathan: we can say there must be 5 interoperable impls or something lower Jonathan: example. for some obscure feature we can require at least 1 implementation, but e.g. 2 interoperable impls of the whole spec DaveO: MUST bar is 1, SHOULD is 2 and MAY = many DaveO: is there an interest to set a bar > 2 on anything... ...no... Glen: volunteers to sest x against y instead of managed process <anish> SOAP 1.2 implementation summary and interop coverage -- http://www.w3.org/2000/xp/Group/2/03/soap1.2implementation.html Bijan: what are the test assertions. what the def of "interoperable" Bijan: there could be assertions that are just not practical to implement JeffM: individual tests are not sufficient for general interop. DaveO: forest of features vs. tree JeffM: yes JeffM: WS-I does interop among the spec forest DaveO: impl of all of the WSDL features interops with another impl of the same features. DaveO: quality vs time tradeoff DaveO: 75% implemented, but then how does one pick that 75%... Bijan: are there serious ambiguities in the spec that this becomes the problem? Jonathan: noone knows Bijan: analytically... we've all read the spec Arthur: we have a historical track record of such ambiguities (WSDL 1.1). spec is subject of the interpretation. Arthur: initial period of impls. is QA on our spec. that is why it is needed. we need enough confidence ouselves that we can implement this. JeffM: say 2.0 is better crafted... there will be ambiguities... something has to happen, but does not say how -> up to interpretation JeffM: yes it is a Q of time. the reality is how the specs are regarded in the market space by users. Paul: this process is to improve Q of the spec. implementations may help to resolve ambiguities. formal impl may not help.. Paul: if 2.0 is that far people may not want to move from 1.1.. Bijan: there are certain places in the spec e.g. F/P where analytically there are ambiguities. Bijan: there is no help in delayng until reference impls (?) <pauld> wonders if at some level if the testpack could be seen as a reference implementation Jonathan: put out the spec + test cases. we can't make anyone impl the spec or be interoperable. we can only serve and not dictate Jacek: impls choose those features that are important for that impl. we should not manadatorily test against all DaveO: danger: CR period = standards body certification. We shouldn't get there. DaveO: our CR citeria should be: 2 interop impls of a feature Bijan: what is impl: is it a validator or actual use case? DaveO: whatever we mean by 2 of them :).. Arthur: pairwise testing is good enough [Arthur is making a point...] Glen: graph of feature dependencies exists by just following the spec. rely on this process rather than 2wise tests. Paul: ir is not a number of impls, it is the test cases themselves Jacek: with 2wise tests one already implements the other needed features anyways cuz' otherwise it won't work JeffM: conclusions from WS-I says 2 is not enough Anish: a feature could be an aggregate, so it is not testing in isilation. this worked for SOAP Roberto: agreeds with JeffM. it becomes "works by accident" otherwise. Roberto: testing processors for understanding of the doc model.. if we stay at the component model it'll be much easier than testing on the wire DaveO: 2wise tests of a feature is a good thing. SOAP 1.2 is a reference [2wise with a predecessor...?] Jonathan: how can we serve the interop. we don't do interop actually. we just help it be better... Bijan: 1) formal criteria for CR and 2) group criteria for voting to move to CR 10:30 Break ---------------------------------------- 10:50 Media Type Description Note [6] - Outstanding issues [7] - Issue 161: Should media-type values allow wild cards [8] [6] http://dev.w3.org/cvsweb/~checkout~/2002/ws/desc/media-types/xml-media-t ypes.html?content-type=text/html;%20charset=utf-8 [7] http://dev.w3.org/cvsweb/%7Echeckout%7E/2002/ws/desc/issues/wsd-issues.h tml [8] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0293.html <anish> http://dev.w3.org/cvsweb/%7Echeckout%7E/2002/ws/desc/issues/wsd-issues.h tml#x161 Jonathan: any objection to closing issue 161 as already implemented? [discussion between Anish/Hugo: */* solves it by saying anything goes. schema validation provides more information...] Jonathan: is this a real issue of is it just because spec is written in the weird way? Hugo: may be remove the sentence and close the issue Anish: would be happy if that was done. Jonathan: close 161 because we already allow *. Remove the sentence that is causing confusion. Jonathan: any objections. [...no...] RESOLUTION: ISSUE 161: CLOSED ------------------------------------------------------- - Issue 245: Define expectedMediaTypeItem to be RFC 2616 Accepts header Hugo: [introduced the issue] Anish: this was meant for WSDL processors to describe what is expected so that it can be received. what is the motivation for the "q" parameter? Hugo: this is just to specify preferences Anish: there are no other places where we specify preferences. Why is this so special? Hugo: we already have a mechanism and we can just allow to specify preferences e.g quality Helen: medical use case: whatever image format you must just accept It. That is the regulation. "q" parameter does not help this use case Hugo: decide useful or not, then see what to put in the spec Jonathan: useful or not? opinions... Bijan: there are various mechanisms how the policies are negotiated Anish: wants to keep the schema simple Jonathan: strawpoll: should a Quality parameter to be added to the expectedMediaType Results: 5 for it 1 against 11 abstained Jonathan: going back to the spec proposals Jonathan: is there a synergy to allow any paremeters or is Q a specific one that needs to be added Anish: parameters + acceptParameters Jonathan: looses the ability to validate, what are the pros of allowing any parameters Jonathan: potential threat to interop Jacek: just do the Q, space separated may be Jonathan: keep the Q and not allow arbitrary parameters. <pauld> RFC2616: http://www.faqs.org/rfcs/rfc2616.html <pauld> Section 14 Jonathan: should we just adopt the parameter: Q, nothing else, point to rfc2616 Jonathan: don't have to express that in a pattern Jonathan: the above is the proposal (Hugo's) Jonathan: won't do ",", only do Q and go back to */* Helen: "," is the problem with i18n Jonathan: 2616 already says what the grammar should be. DBooth: 2616 says it is "." Anish: " are allowed or not? Jonathan: objections to adopting the proposal? [... no ...] RESULTION: ISSUE 245: CLOSED 12:30 Lunch ---------------------------------------- Scribe: Glen 13:30 Media Type Description Note (cont.) - Issue 204: Why default to */* instead of to "no effect"? [asir: http://www.w3.org/2002/ws/desc/2/06/issues.html#x204] Jacek: didn't we remove this? [various: yes, but now we have */*] Jacek: */* means everything goes Anish: doesn't say anything about opaque or app/octet-stream now, everything is allowed Jonathan: this is obsolete - can we close it? [no disagreement] RESOLUTION: Issue 204 closed as obsoleted by Issue 161 ------------------------------------------------------- - Issue 162: Allowing other choices for mediaType values [9] [9] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0294.html Issue 162 Jonathan: close it? [no disagreement] RESOLUTION: Issue 162 closed; obsolete issue ------------------------------------------------------- - Issue 198: mismatch between value of media type attribute and pattern [http://dev.w3.org/cvsweb/%7Echeckout%7E/2002/ws/desc/issues/wsd-issues. html#x198] [Issue is doesn't say anything about what happens when the value of content-type attribute differs from the media type specified] Jonathan: should this be treated like a mismatched schema? Glen: does WSDL say anything about that? Anish: treat it the same way we do schema, if it's silent fine Jonathan: runtime problems are perhaps out of scope? objection to closing? RESOLUTION: Issue 198 closed with no action ------------------------------------------------------- - Issue 199: mismatch between the media type attribute and the actual data [http://dev.w3.org/cvsweb/%7Echeckout%7E/2002/ws/desc/issues/wsd-issues. html#x199] What if the contents are wrong/bad? Jonathan: this is also out of scope (see 198) Anish: Yup, proposal on list which says that. [objection to closing?] Anish: do we point out that we're not dealing with this, or stay silent about it? Asir: silent RESOLUTION: Issue 199 closed with no action ------------------------------------------------------- - Issue 200: Where should appInfo go? [http://dev.w3.org/cvsweb/%7Echeckout%7E/2002/ws/desc/issues/wsd-issues. html#x200] Jonathan detours, to talk about attributes vs. annotations Jonathan: can we use attribute for e-m-t as well? Asir and Glen generally like this idea Jonathan: expose as attribute and react based on feedback Anish: some of the tools do not expose out-of-band attribute Anish: better interop via appInfo element Arthur: how big is this info? Anish: open a new issue Marsh: describes the issue Anish: argues for attaching expectedMedia type info to type or element [anish: http://lists.w3.org/Archives/Public/www-ws-desc/2004Aug/0005.html] Glen: out-of-band attribute or appInfo element, should be allowed on type or element Marsh: can we attach this to a model group? or any other schema component? Roberto: nope, I don't think so Jonathan: proposal is to add a sentence/para saying where this annotation may appear any objections? RESOLUTION: Issue 200 closed; annotation may appear on elements and types. (discussion of attribute vs. appInfo) Arthur looks at Xerces API [asir: see http://www.w3.org/Submission/2004/SUBM-xmlschema-api-20040309/xml-schema -api.html#Interface-XSAnnotation] Xerces API is horrible, apparently. Only offers a single "annotation string" which we don't know what it is Glen: we don't use Xerces API for parsing schema, we do it ourselves Roberto: us too Arthur: We use it. Glen: do you then look into that to resolve things? Arthur: yes, types and element declarations (discussion of APIs, which led to the conclusion that if you have to parse the DOM anyway, it's no harder to get appInfo than it is to get attributes) [asir: .NET XMLSchemaAnnotation class is at http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/h tml/frlrfsystemxmlschemaxmlschemaannotationclasstopic.asp] DaveO: We have pseudo-schema this time around, so can't just validate WSDL with schema Arthur: Right, the rest is code Paul: Doesn't schema have a component model? Glen: Yes, but Xerces apparently doesn't do all of it. Asir: Many impls probably don't Glen: All toolkits I know of do the schema parsing themselves... [asir: Anish, it is at http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#cAnnotations] Arthur: Eclipse model looks better Roberto: Yeah, this is needed for JAXB too straw poll - attribute vs. appInfo Results: 9 for attribute, 1 for element, 4 abstains Jonathan: In any case, we should probably flag this as an ed note Anish: can we postpone until tomorrow? Jonathan: sure. WG is therefore substantially in favor of moving to attribute syntax if possible. NEW ISSUE 252 - syntax of media type annotation Will resolve for LC tomorrow pending a little research by Anish tonight. ------------------------------------------------------- - Issue 201: Name of mediaType [10] [10] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0295.html RESOLUTION: Issue 201 closed; already resolved ------------------------------------------------------- - Issue 202: More examples Jonathan: Yea verily. Arthur: Test suite might help here Jonathan: what do we need in the text? Anish: Examples with new stuff (*/*, etc) Anish: issue raiser wanted an example with static type (fixed at schema definition time) ACTION: Anish to write up some examples and add them to the spec Arthur: Let's make sure that we have this as a test case as well (discussion of how to keep content in sync) RESOLUTION: 202 CLOSED with Anish's todo For now we'll manually make sure examples in the spec are copied to the test suite, as opposed to scripting such a thing. ------------------------------------------------------- - Issue 203: Limited to base64encoded? Why is this limited to base64encoded? Anish: Is this asking for the rationale, or asking for other types? Jonathan: other types, probably [(discussion of which types should be allowable) Question comes down to - can media type designator be factored out from MTOM such that it can be used in different situtations, and then MTOM can restrict it] Jacek: We're attaching content-type info to the value of an element (not the lexical rep thereof). Can't assign media types to, for instance, numbers...so doesn't make sense for xsd:int.... just octet-streams [general agreement we should expand to allow hexBinary] (discussion of strings and character sets and embedding docs within docs, which gets back to desire to restrict to binary) Jonathan: worth adding rationale text in doc? Anish: put it in the closing email, but not in the doc... [JacekK: rationale for contentType on hexBinary (and base64binary): content types can be applied to sequences of octets, therefore the XML Schema types whose value sets are sequences of octets can be annotated with content type] Jonathan: Objections to closing 203 by adding hexBinary to allowable media types? no objections RESOULTION: Issue 203 closed by adding hexBinary. ------------------------------------------------------- - Issue 205: Explain priority [11] [11] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0296.html http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0296.html Explain priority Jonathan: This might be fixed already RESOLUTION: Issue 205 closed; obsolete ------------------------------------------------------- - Issue 206: Annotations and schema component model. [12] [12] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0297.html RESOLUTION: Issue 206 closed; obsolete, and duplicates 200 ------------------------------------------------------- - Issue 242: Binding accepts header and output serialization > - expectedMediaType placed on an input message is equivalent to an > Accept header from the POV of the service. (discussion of whether or not we need to change any text) Glen suggests perhaps putting this info into the primer, and not the spec itself, since it's informative but not normative (lots of buck-passing about where this should go) Hugo: now that we support quality param, it's more and more obvious that there is a parallel... maybe we just add a sentence in the media-type doc drawing the analogy/parallel. Anish: this already exists in the media-types doc.... proposal: s/"the value of the "/"the value, and the meaning thereof, of the "/ in the media type doc [hugo: +1] "the value and the meaning of the " this is section 2.2, third paragraph, of the media type doc ACTION: Editors to make a change to section of 2.2 of the media type doc to reflect that the meaning (not just the value space) of the expected media type is the same as the accept header. RESOLUTION: Issue 242 closed by making a change to section 2.2 of the media type doc to reflect that the meaning (not just the value space) of the expectedMediaType is the same as the Accept header. 15:30 Break ---------------------------------------- Jonathan: let's check AIs; NOW = Roberto doing as we speak. DONE 2004-05-21: Editors to add ednotes to the spec to indicate areas that had contention. (Issue 190) NOW 2004-06-17: Editors to incorporate David Booth's clarification in section 8.3 DONE 2004-07-08: Editors to implement resolution to 177 as amended. (discussion of 177 and whether we should rejigger the types in the SOAP 1.2 binding) 177 editorial work was done, but after reviewing that work we have a new issue, which Asir will mail to the list. DONE 2004-07-08: Glen to verifiy composition model. DONE 2004-07-15: People who want to file a minority opinion should do so by July 22. DONE 2004-07-15: Editors to incorporate Operation Name proposal v3 DONE 2004-07-29: Editors implement proposal (Issue 250). DONE 2004-07-29: Editors incorporate Glen's "some new text" into section 2.8.1 of part 1. NOW 2004-07-29: Editors incorporate text from thread "please review text" (333) with changes of provider agent to service. NOW 2004-07-29: Editors remove entire text of Issue 211 resolution. DONE 2004-07-29: Editors to move "AD Feature/HTTP binding" material into part 2. DONE 2004-07-29: Editors add comment about how the wrapper element is defined. 15:50 XMLP Last Call comment disposition - XMLP WG response to our comments [13, 14, 15] [13] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0036.html [14] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0006.html [15] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0272.html XMLP Last Call comment disposition http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0036.html http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0006.html [Marsh: http://www.w3.org/2000/xp/Group/xmlp-lc-issues.html#x489] Jonathan: Are we ok with this? Glen: No. It would be good to understand why they made that decision. If it's a good reason, then fine, but we'd like to know a little more than "no action". ACTION: Glen to inquire to XMLP about the rationale for closing 489 http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0272.html [anish: http://www.w3.org/2000/xp/Group/4/06/30-minutes.html] [anish: url to the minutes of XMLP concall above (search for issue 489)] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0272.html is done, and we're fine with it [asir: XMLP issue 490] Jonathan got private response about issue 490, which says they accept it with a tweak [Summary: 3 issue resolutions accepted, one not (490)] 16:30 Intermediaries [16, 17] [16] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0366.html [17] http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0369.html Intermediaries http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0366.html http://lists.w3.org/Archives/Public/www-ws-desc/2004Jul/0369.html Hugo: notes that "intermediary" does not even exist as a term anywhere in the current SOAP binding [asir: I don't believe that AD feature allows actor attribute, Hugo?] In a way we sort of support intermediaries by using the AD feature with SOAP role/actor attributes in the schema... but should we do something like <soap:module role="..."/> Glen: no Roberto: No Glen: Modules can do lots of different things, and might for instance have the role attributes fixed in the spec. Therefore it seems tricky to suggest that ALL modules should support this... Plus module authors can specify properties for this.... DaveO: It's really hard to describe all the potential transformations as a message moves from a sender to an ultimate destination... DaveO: We are not yet ready to move into this problem space. If we try to do it now, we're never going to ship. [hugo: asir, hmmm... I thought it did, but you're right, I don't see it anymore...] [hugo: asir, actually, I don't think that there are limits to what you can use, including the actor attribute] (discussion about using a property for this kind of thing, and the fact that this pretty much enables this kind of thing *for specs which explicitly write this functionality in*, which seems good) Proposal: do nothing for now (discussion of dropping the requirement) Proposal from DaveB Drop the requirement because: 1) Although WSDL does not provide explicit support for intermediaries, it is possible using existing extension mechanisms to indicate that intermediaries are in use and configurable 2) We do not have a clear understanding of what would be needed in order to more fully support intermediaries 3) Insufficient support in the WG to pursue this further Proposal is to amend the requirements doc by deprecating/greying-out the requirement and adding the above text. RESOLUTION: Deprecate Intermediaries requirement ACTION: Marsh to update Req doc to deprecate intermediaries requirement 17:00 Adjourn
Received on Tuesday, 24 August 2004 19:11:43 UTC