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Re: Is it best practices to use a rdfs:seeAlso link to a potentially multimegabyte PDF?, existing predicate for linking to PDF?

From: Phil Archer <phil.archer@talis.com>
Date: Mon, 10 Jan 2011 08:55:59 +0000
Message-ID: <4D2AC99F.7060402@talis.com>
To: Vasiliy Faronov <vfaronov@gmail.com>
CC: Tim Berners-Lee <timbl@w3.org>, Peter DeVries <pete.devries@gmail.com>, public-lod@w3.org
I'd be happy enough to see greater granularity for rdfs:seeAlso. I have 
a use case where I want to say something like "the <uri> has been minted 
recently by a source that is not authoritative but that, if widely 
adopted, could become so. Either way, it's worth noting that he and I 
are talking about the same thing" - and rdfs:seeAlso doesn't really 
cover that nuance!

However... a property should not imply any content type AFAIAC. That's 
the job of the HTTP Headers. If software de-references an rdfs:seeAlso 
object and only expects RDF then it should have a suitable accept 
header. if the server can't respond with that content type, there are 
codes to handle that.

Phil.

On 09/01/2011 15:21, Vasiliy Faronov wrote:
> On Птн, 2011-01-07 at 11:47 -0500, Tim Berners-Lee wrote:
>> Certainly. the tabulator follows rdfs:seeAlso and expects some terse
>> RDF.
>> and so would be crippled by any large file, and PDF would not of
>> course help it at all.
>> I take seeAlso as a fairly strong request to see the other thing, like
>> an HTTP redirect.
>> Not a generic "this is vaguely related" link at all, and not in
>> general to point to human-readable stuff.
>
> Maybe it's time to define several specializations of rdfs:seeAlso with
> stronger semantics?
>
> For example (in a hypothetical namespace):
>
> - see:authoritative -- "strong" pointer to a defining document,
>    equivalent to (or even superseding) follow-your-nose. Could probably
>    just reuse wrds:describedby, though it's not a subproperty of
>    rdfs:seeAlso.
> - see:continued -- pointer to more data of the same nature. Would be
>    useful for paged data. When you have a blog marked up with RDFa, you
>    may want to let the consumer know that any given page is really just
>    a part of it. "Strength" depends on the application.
> - see:historical -- pointer to data that no longer holds, thus cannot
>    be taken at face value, but only in conjunction with some
>    time-related terms (like owlTime:Interval). In other words, "don't go
>    there unless you are time-enabled".
> - see:non_rdf -- pointer to a machine-readable description that is not
>    in a serialization of RDF (GRDDL not counted as one).
> - see:human_readable -- pointer to a description that is human-readable
>    only.
>
> --
> Vasiliy Faronov
>
>
>
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Phil Archer
Talis Systems Ltd,
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Tel: +44 1473 434770
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Received on Monday, 10 January 2011 08:56:38 UTC

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