- From: Martin Alvarez-Espinar <mlvarez@w3.org>
- Date: Thu, 8 Dec 2011 20:00:35 +0100
- To: Richard Cyganiak <richard@cyganiak.de>
- Cc: Phil Archer <phila@w3.org>, Fadi Maali <fadi.maali@deri.org>, John Erickson <olyerickson@gmail.com>, Public GLD WG <public-gld-wg@w3.org>
Hi Richard, Indeed, I have seen many different cases I can gather and write, of course. Maybe we should use the wiki to avoid noise on the list. What do you think? Best, Martin On Dec 8, 2011, at 5:21 PM, Richard Cyganiak <richard@cyganiak.de> wrote: > Martin, > > I think a great way to make progress here is to document various scenarios that we'd like to describe in dcat. > > Here some fictional examples: > > “There's an XML file called itf2007.xml inside a Zip file itf-raw.zip. The Zip file is downloadable from http://example.gov/data/itf-raw.zip. There is a web page with documentation and a link to the zip file at http://example.gov/content/proj/itf/download.html.” > > Or: > > “There's a RESTful web service to the ITF database. The homepage of the database is http://example.gov/content/proj/itf/index.html. The API documentation is at http://itf.example.gov/doc/api. All API calls start with http://itf.example.com/api?…” > > Or: > > “The ITF database is available for download as a number of Excel spreadsheets, one per month. They are available as http://example.gov/data/YYYY/itf-MMMM.xls”, where YYYY is the year (e.g., 2007) and MMMM is the month (e.g., “january”). There's a web page with a table that lists all the downloadable files at http://example.gov/content/proj/itf/download.html.” > > Once we have a collection of such scenarios, we can figure out and document how to express them all in dcat. This could also form the basis of a “cookbook” for using dcat to model real-world data access scenarios; and should perhaps become part of the use cases document too. > > Maybe you could make a start by writing up the scenarios that motivated you to add the access type concepts? Perhaps start with an email to the list; I imagine that the editors can find a place where to put this on the wiki. > > All the best, > Richard > > > On 8 Dec 2011, at 08:12, Martin Alvarez-Espinar wrote: > >> Hello Phil, >> >> Good work on the Working Draft [1]! (also Fadi and John, of course). I >> totally agree with this early version, but I would like to point out >> the need of an additional property for the dcat:Distribution class. It >> would be used to indicate if the access to data refereed by >> dcat:accessURL is either 'direct' or 'indirect'. We discussed it time >> ago, but we didn't modify the draft on the wiki. >> >> Some examples: >> -> Direct: accessURL points to a WebService, RSS, XLS, or XML, which >> offers the distribution directly. >> -> Indirect: accessURL points to a REST WebService or API >> documentation (how to use it, parameters, etc) | an XML zipped >> >> We have solved this issue using the property dcterms:type and a couple >> of concepts (indirect-access, direct-access) to set type of each >> distribution. >> >> [] a dcat:Distribution ; >> dcat:accessURL "http://.../file.xml"^^xsd:anyURI ; >> dcterms:type <http://purl.org/ctic/dcat#accessMode-direct> ; >> ... >> >> [] a dcat:Distribution ; >> dcat:accessURL "http://.../file.zip"^^xsd:anyURI ; >> dcterms:type <http://purl.org/ctic/dcat#accessMode-indirect> ; >> ... >> >> I would like to give a hand enriching the draft if you need it. Maybe >> we should provide more implementation examples for each property >> (resources, taxonomies, etc.). >> >> Best regards, >> >> Martin >> >> [1] https://www.w3.org/2011/gld/group/WD-DCAT-20111218.html >> >> -- >> Martin Alvarez Espinar >> W3C Spain Office Manager tel.:+34 984390616 >> http://www.w3c.es/Personal/Martin mlvarez@w3.org >> >
Received on Thursday, 8 December 2011 19:01:27 UTC