Re: New reply: "Vocabulary URIs not dereferencable"

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Andreas Harth

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Sep 21, 2011, 7:40:06 AM9/21/11
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Dear Jon,

On 09/21/2011 12:21 PM, Metadata Management Associates on Get Satisfaction! wrote:
> When we moved to a new ISP, despite pre-move testing, we broke some things.
> This one has finally been fixed.
> Thanks for bringing it to our attention.

thanks for fixing the dereferencing issue!

There is still a small hickup though: the VIAF data (e.g., [1]) uses
uppercase hostnames (RDVocab.info), while the vocabulary file at [3]
is lowercase (rdvocab.info).

@Pedants: should I tinker with the RDF and convert all hostnames
to lowercase? Or is that better fixed at the source?

Cheers,
Andreas.

[1] http://viaf.org/viaf/12306965
[2] http://RDVocab.info/ElementsGr2/dateOfBirth
[3] http://rdvocab.info/ElementsGr2/dateOfBirth.rdf

Richard Cyganiak

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Sep 21, 2011, 10:59:10 AM9/21/11
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Hi Andreas, hi Jon,

On 21 Sep 2011, at 12:40, Andreas Harth wrote:
> There is still a small hickup though: the VIAF data (e.g., [1]) uses
> uppercase hostnames (RDVocab.info), while the vocabulary file at [3]
> is lowercase (rdvocab.info).
>
> @Pedants: should I tinker with the RDF and convert all hostnames
> to lowercase? Or is that better fixed at the source?

The working draft of the upcoming RDF 1.1 Concepts & Abstract Syntax spec [1] has some text that is relevant here. (I'm the editor of this document, so I'm doing my best to inject some extra pedantry straight into the spec.)

[[
Interoperability problems can be avoided by minting only IRIs that are normalized according to Section 5 of [IRI]. Non-normalized forms that should be avoided include:

* Uppercase characters in scheme names and domain names
]]

So I think there is a good case that an URI with uppercase characters in the hostname, like <http://RDVocab.info/…>, is bad practice and the hostname should be changed to lowercase. (Uppercase characters elsewhere in the URI are fine though.)

Best,
Richard

[1] http://www.w3.org/TR/rdf11-concepts/#section-IRIs

Jon Phipps

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Sep 21, 2011, 11:08:04 AM9/21/11
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re: "the hostname should be changed to lowercase."

Which we did. So Andreas, it would be a good idea to change your references as well.

Jon

I check email just a couple of times daily; to reach me sooner, click here: http://awayfind.com/jonphipps

Andreas Harth

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Sep 21, 2011, 11:32:03 AM9/21/11
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Hi Jon,

On 09/21/2011 05:08 PM, Jon Phipps wrote:
> re: "the hostname should be changed to lowercase."
>
> Which we did. So Andreas, it would be a good idea to change your references
> as well.

thanks again!

I thought maybe you know the VIAF guys (who, by the way, provide excellent
data). The VIAF guys use your vocabulary (with uppercase hostname, e.g. they
use [1] at [2]).

I'm filling in a contact form at [1] and let them know directly.

Cheers,
Andreas.

[1] http://RDVocab.info/uri/schema/FRBRentitiesRDA/CorporateBody
[2] http://viaf.org/viaf/123679918
[1] http://www.oclc.org/research/feedback/form.asp?project=VIAF

Andreas Harth

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Sep 21, 2011, 2:27:09 PM9/21/11
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On 09/21/2011 05:32 PM, Andreas Harth wrote:
> I'm filling in a contact form at [1] and let them know directly.

The VIAF guys fixed the export.

Thanks guys!

Best regards,
Andreas.

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