Hi Ben and Rob, Thanks for the feedback.
Regards, On 02/27/2017 11:40 PM, Ben Caradoc-Davies wrote: > Also note that gml:id is only mandatory in GML 3.2.1; it was optional > in GML 3.1.1. gml:id has type xs:ID which forces uniqueness in a > single document. WFS suggests (implies? urges?) that gml:id should be > stable and unique for a service, but there is nothing in GML to > enforce this. There is nothing in GML to prevent each response from > using different gml:ids, as long as they are unique in each response > document. The problem is that there is AFAIK no support for > gml:identifier in WFS. It is nice to have an indentifier that is > globally unique; there is no guarantee that gml:id is. > > Kind regards, > Ben. > > On 28/02/17 10:23, Rob Atkinson wrote: >> Gml:identifier was introduced for stable id. Gml:id is really meant for >> reference with the response document but WFS blurred the line with its >> getbyid. >> >> So it comes down to implementation contracts between service and >> clients... >> force ids to be stable, mirror in gml:identifier and allow wfs call on >> ids.. or... specify how stable ids are somehow... or just ignore getbyid >> method. >> >> On Tue, 28 Feb 2017, 8:08 AM Nuno Oliveira >> <nuno.olive...@geo-solutions.it> >> wrote: >> >>> Hi, >>> >>> I was investigating a WFS cascading issue when I stepped on this two >>> pieces of code (this code is the same in the old WFS store and the new >>> one): >>> >>> https://github.com/geotools/geotools/blob/master/modules/unsupported/wfs-ng/src/main/java/org/geotools/data/wfs/internal/parsers/XmlSimpleFeatureParser.java#L180-L180 >>> >>> >>> >>> https://github.com/geotools/geotools/blob/master/modules/unsupported/wfs-ng/src/main/java/org/geotools/data/wfs/internal/parsers/XmlSimpleFeatureParser.java#L881-L895 >>> >>> >>> >>> So if GT is not capable to extract a feature id (FID) from a feature, >>> the current feature and all next features are ignored. I checked WFS >>> specification and related schemas, GML schemas and searched on GS\GT >>> mailing list and I'm not sure I understood correctly all the behavior >>> around features FIDs. >>> >>> My impression is that a feature should always be uniquely identifiable >>> by an ID but at the same time nothing in GML seems to enforce that. >>> GeoTools on is side seems to also assume that a feature can be always >>> uniquely identified by an id (I may be wrong). >>> >>> Can someone shine a light on this ? >>> >>> Regarding the WFS cascading behavior, does it make sense to allow the >>> user to select an attribute that can be used as FID ? >>> >>> Regards, >>> >>> Nuno Oliveira >>> >>> -- >>> == >>> GeoServer Professional Services from the experts! >>> Visit http://goo.gl/it488V for more information. >>> == >>> Nuno Miguel Carvalho Oliveira >>> @nmcoliveira >>> Software Engineer >>> >>> GeoSolutions S.A.S. >>> Via di Montramito 3/A >>> 55054 Massarosa (LU) >>> Italy >>> >>> phone: +39 0584 962313 >>> fax: +39 0584 1660272 >>> mob: +39 333 8128928 >>> >>> http://www.geo-solutions.it >>> http://twitter.com/geosolutions_it >>> >>> ------------------------------------------------------- >>> >>> AVVERTENZE AI SENSI DEL D.Lgs. 196/2003 >>> Le informazioni contenute in questo messaggio di posta elettronica e/o >>> nel/i file/s allegato/i sono >>> da considerarsi strettamente riservate. 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The sender >>> does not give any warranty or accept liability as the content, >>> accuracy or completeness of sent messages and accepts no responsibility >>> for changes made after they were sent or for other risks which >>> arise as a result of e-mail transmission, viruses, etc. >>> >>> >>> >>> ------------------------------------------------------------------------------ >>> >>> >>> Check out the vibrant tech community on one of the world's most >>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>> _______________________________________________ >>> GeoTools-Devel mailing list >>> GeoTools-Devel@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/geotools-devel >>> >> >> >> >> ------------------------------------------------------------------------------ >> >> >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >> >> >> >> _______________________________________________ >> GeoTools-Devel mailing list >> GeoTools-Devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/geotools-devel >> > -- == GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information. == Nuno Miguel Carvalho Oliveira @nmcoliveira Software Engineer GeoSolutions S.A.S. Via di Montramito 3/A 55054 Massarosa (LU) Italy phone: +39 0584 962313 fax: +39 0584 1660272 mob: +39 333 8128928 http://www.geo-solutions.it http://twitter.com/geosolutions_it ------------------------------------------------------- AVVERTENZE AI SENSI DEL D.Lgs. 196/2003 Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e -mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003. The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. 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