Way way back in the long distant past of the project SteveC arranged for key/value pairs to be used for adding information about objects (Nodes, Segments and the unused Areas at the time) but in doing so did not set any restrictions on their use whatsoever. In fact all tags were concatenated simply in a delineated single field. Duplicate keys were perfectly valid then and indeed I recall we discussed how we might use duplication for tagging purposes. It was only the lack of support in the editors that stopped duplication in its tracks.
Times change and the format of the database tables has changed and a more sophisticated method of storage for tags has come about. While duplication is still valid under API 0.5 its really a legacy functionality that's not being used for any useful purpose and hence why its any easy decision to drop duplication support going forwards. Till that time I suggest you use one of the workarounds suggested for your own work. Cheers Andy >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] >On Behalf Of Stefan de Konink >Sent: 09 October 2008 2:59 AM >To: Grant Slater >Cc: OSM-Dev Openstreetmap >Subject: Re: [OSM-dev] way 7062297, is this new? > >-----BEGIN PGP SIGNED MESSAGE----- >Hash: SHA512 > >Grant Slater schreef: >> Stefan de Konink wrote: >>> .. >>> <tag k="AND_nosr_r" v="15457132"/> >>> <tag k="AND:importance_level" v="5"/> >>> <tag k="AND_nosr_r" v="15457132"/> >>> .. >>> <tag k="AND:importance_level" v="5"/> >>> ... >>> >>> Could anyone *please* elaborate since when this is possible? (Look at >>> the duplicate keys.) >>> >>> If this is /just allowed/ it fubars my entire database update model. >>> >> >> Allowed via the 0.5 API currently: Yes. >> Supported by any of the editors: No (AFAIK) >> >> On a hunch, don't expect the 0.6 API to support duplicates. > >Then disable *ANY* edits with this borked editor: "Potlatch 0.10c" and >revert back to a version that did not produce duplicates. > >I'm currently writing a Foundation member over this corruption, it >breaks far too many things. > > >Stefan >-----BEGIN PGP SIGNATURE----- >Version: GnuPG v2.0.9 (GNU/Linux) >Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > >iEYEAREKAAYFAkjtZVUACgkQYH1+F2Rqwn1rXgCggKcjjc8sMGV4bBBGaByW5PB0 >oHcAn1aApSfiSYEU5O7uhXD5514EWgGo >=LdAz >-----END PGP SIGNATURE----- > >_______________________________________________ >dev mailing list >[email protected] >http://lists.openstreetmap.org/listinfo/dev > >No virus found in this incoming message. >Checked by AVG - http://www.avg.com >Version: 8.0.173 / Virus Database: 270.7.6/1715 - Release Date: 08/10/2008 >7:19 PM _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
