- From: Raphaël Troncy <raphael.troncy@eurecom.fr>
- Date: Mon, 16 Mar 2015 18:29:11 +0100
- To: Simon.Cox@csiro.au, andrea.perego@jrc.ec.europa.eu, public-sdw-wg@w3.org
Dear Simon, > 1.1 URIs should be stable/persistent - I have seen suggestions that > URIs can be easily minted using database keys. The risk with these is > that keys are probably less stable than the things identified. +1 ! and I'm sure that Phil has emphasized this aspect of stability and persistence given his prior work :-) What about the dereferencability of such URIs? Should a best practice document recommend this? > 1.8 The OGC URI scheme includes common CRS. Try > http://www.opengis.net/def/crs/EPSG/0/4326 for example. I trust that > one of the OGC people in the meeting mentioned this? Correct. The problem is that the list of CRS maintained by OGC is neither complete nor up-to-date. This might be the problem for any central organization that is willing to maintain such a list that is changing over the time. In France, the National Geographic Institute (IGN) is maintaining another (long) list of CRS being used in its data, see also the vocabulary for defining CRS at http://data.ign.fr/def/ignf. IGN is providing stable, persistent and dereferencable URIs for numerous CRS such as RGF93 (Lambert93 projection) used in France Continental, RGFG95 used in Guyana, RGR92 used in Reunion island, RGM04 used in Mayotte, WGS84 used in Guadeloupe (with various UTM projections), etc. Raphaël -- Raphaël Troncy EURECOM, Campus SophiaTech Multimedia Communications Department 450 route des Chappes, 06410 Biot, France. e-mail: raphael.troncy@eurecom.fr & raphael.troncy@gmail.com Tel: +33 (0)4 - 9300 8242 Fax: +33 (0)4 - 9000 8200 Web: http://www.eurecom.fr/~troncy/
Received on Monday, 16 March 2015 17:29:38 UTC