- From: Andrea Perego <andrea.perego@jrc.ec.europa.eu>
- Date: Thu, 18 Jun 2015 02:03:00 +0200
- To: Peter Baumann <p.baumann@jacobs-university.de>
- Cc: Frans Knibbe <frans.knibbe@geodan.nl>, Simon Cox <Simon.Cox@csiro.au>, SDW WG Public List <public-sdw-wg@w3.org>
Hi, Peter. On Wed, Jun 17, 2015 at 1:14 PM, Peter Baumann <p.baumann@jacobs-university.de> wrote: > Hi Frans, > > again, this XML is just an _example_ showing the ingredients. Nobody says it > must be XML! See my mail below: use RDF, JSON, or any other format to > represent CRS + coordinates. > > Dublin Core - BTW, it's XML ;-) ) works on another level of metadata, here > an example from Wikipedia (http://www.w3.org/wiki/DublinCore): > > <meta name="DC.Coverage.spatial" scheme="TGN" content="name=San Francisco > (San Francisco county, California, United States)" /> <meta > name="DC.Coverage.spatial" scheme="DCMIPOINT" content="name=San Francisco, > CA, U.S.A.; east=237.5833; north=37.7667" /> > > Hence, Dublin Core uses a _description_ rather than an exact _location_. > AFAICS the requirement under discussion focuses solely on the issue of > representing space (and likely time) exactly (that is: through coordinates). > Inexact representation, as done here, is another requirement. On the side, > note the missing CRS. In "European" coordinates, this might end up in the > Pacific ocean ;-) BTW, Dublin Core has also a dct:Box syntax encoding scheme, described here: http://dublincore.org/documents/dcmi-box/ The syntax encoding schemes defined for dct:Box, dct:Point and dct:Period have been discouraged quite a few years ago in favour of the use of specific properties, that however are not defined in Dublin Core. See, e.g., the examples provided here: http://wiki.dublincore.org/index.php/User_Guide/Publishing_Metadata#dcterms:spatial http://wiki.dublincore.org/index.php/User_Guide/Publishing_Metadata#dcterms:temporal For more details about how spatial / temporal coverage is defined in Dublin Core, and why, Makx Dekkers and Simon (Cox), who were involved in that work, provided very enlightening explanations during a long email conversation on "space and time" carried out by the LOCADD CG - see: https://www.w3.org/community/locadd/wiki/Space_and_Time#Space_and_time_in_Dublin_Core Cheers, Andrea ---- [1]https://joinup.ec.europa.eu/node/139283/ [2]https://webgate.ec.europa.eu/CITnet/stash/projects/ODCKAN/repos/iso-19139-to-dcat-ap/
Received on Thursday, 18 June 2015 00:03:50 UTC