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Re: Question about identifiers

From: Ed Parsons <eparsons@google.com>
Date: Fri, 19 Aug 2016 09:01:47 +0000
Message-ID: <CAHrFjc=S3=0nBOBKH9guYVf7FT77RVKGAJWaLfcZvZsJ+RzDzQ@mail.gmail.com>
To: Frans Knibbe <frans.knibbe@geodan.nl>, "SDW WG (public-sdw-wg@w3.org)" <public-sdw-wg@w3.org>
Cc: Linda van den Brink <l.vandenbrink@geonovum.nl>, "Joshua Lieberman (jlieberman@tumblingwalls.com)" <jlieberman@tumblingwalls.com>, Byron Cochrane <bcochrane@linz.govt.nz>
While I accept that the current view of URI schemes having no explicit
meaning, I do see great value in the /{municipality}/{quarter}
/{neighbourhood} as a simple way of
expressing geographical hierarchy independent of geometry... What's the
worst that could happen ?


On Fri, 19 Aug 2016 at 09:30 Frans Knibbe <frans.knibbe@geodan.nl> wrote:

> Hi,
> A prime requirement of good URI minting is to not put any meaning in the
> URI, at least no meaning that is somehow intended for consumers. Everything
> that needs to be said about a resource, like its membership of data
> collections or its versioning, can be said in the data that is returned
> when the URI is dereferenced.
> URI schemes like /{municipality}/{quarter}/{neighbourhood} could be
> dangerous, because consumers could inadvertently try to derive meaning from
> such an URI. The usefulness of such a scheme in URI minting is also
> doubtful, because administrative structure can change in time. That could
> complicate the URI minting procedures over time.
> I do wonder to what extent common web crawlers try to parse URIs and
> attach meaning to URI parts.
> Regards,
> Frans
> On 18 August 2016 at 22:55, Byron Cochrane <bcochrane@linz.govt.nz> wrote:
>> Hi,
>> I like the guidance under the URI-Strategy under Hierarchical URIs
>> generally, but have some reservations to this intelligent identifiers
>> approach.
>> For metadata access I think it is a good thing.  Most metadata for an
>> individual features will usually reside at the dataset or collection
>> (better term) level.  This hierarchical approach makes this metadata easy
>> to access.
>> But this built in intelligence makes the permanence of the URIs more
>> difficult.  For example, administrative boundaries change through mergers
>> and annexations.  A spatial thing that was in one collection is now in
>> another.  The URIs for these things then confuse more than help.  URI
>> redirects are one way to deal with this, but perhaps tracking these
>> relationships through applied ontologies such as skos:broader and
>> skos:narrower is the better practice?
>> No answers from me here, just questions.
>> Cheers,
>> Byron
>> ________________________________________
>> From: Linda van den Brink [l.vandenbrink@geonovum.nl]
>> Sent: Thursday, August 18, 2016 8:28 PM
>> To: Joshua Lieberman (jlieberman@tumblingwalls.com)
>> Cc: SDW WG (public-sdw-wg@w3.org)
>> Subject: Question about identifiers
>> Hi Josh,
>> Coming back to the telecon yesterday:
>> <joshlieberman> Should identifiers be part of a system for the features
>> of interest?
>> joshlieberman: making identifiers part of a system, where the features
>> are part of the system?
>> ... for example corresponding to paths in a taxonomy
>> Linda: no answer right now, will have to think about it
>> Were you talking about recommending some system for creating HTTP URI
>> identifiers, i.e. some sort of URI strategy or pattern? Specifically where
>> the features can be organised into some system like a hierarchy, as with
>> administrative regions? There are some examples from Geonovums testbed here
>> https://github.com/geo4web-testbed/topic3/wiki/URI-Strategy under
>> Hierarchical URIs.
>> Just trying to understand what you mean… we could add some guidance to
>> the BP about this. I think that would be helpful.
>> Linda
>> ______________________________________
>> Geonovum
>> Linda van den Brink
>> Adviseur Geo-standaarden
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> --

*Ed Parsons *FRGS
Geospatial Technologist, Google

Google Voice +44 (0)20 7881 4501
www.edparsons.com @edparsons
Received on Friday, 19 August 2016 09:02:27 UTC

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