W3C home > Mailing lists > Public > public-vocabs@w3.org > December 2014

Re: Proposed update for Microdata to RDF specification

From: Dan Brickley <danbri@google.com>
Date: Mon, 01 Dec 2014 12:08:00 +0000
Message-ID: <CAK-qy=5td+=yfzPJatUiLLbybhB_tcr6Kv7Etj3PePU7VyJDAA@mail.gmail.com>
To: chaals@yandex-team.ru, Ivan Herman <ivan@w3.org>, Gregg Kellogg <gregg@greggkellogg.net>
Cc: W3C Semantic Web IG <semantic-web@w3.org>, W3C Web Schemas Task Force <public-vocabs@w3.org>
 On Mon, 1 Dec 2014 17:18 null <chaals@yandex-team.ru> wrote:

01.12.2014, 14:38, "Ivan Herman" <ivan@w3.org>:
...
> https://github.com/w3c/microdata-rdf/issues
...
> However, issue #5, on @itemprop-reverse, is really open. Personally, I do
not believe that feature should be included in the conversion spec; it
amounts to an extension of microdata, which goes beyond what this document
is for...

Yes, much as I like the idea, I think we should put the feature into
microdata rather than wedge it in through this spec.


Having a spec for extracting item proper ever we into triples is a healthy
precursor for having actual tools which do that, which in turn is a big
part of making the case that such a change to microdata would be useful and
used. This is only a Note - my opinion is strongly in favour of including
it, although with health/status warnings.

Dan



cheers

Chaals

> Ivan
>>  On 01 Dec 2014, at 05:55 , Gregg Kellogg <gregg@greggkellogg.net> wrote:
>>
>>  Last call for comments on this draft. Unless issues are raised by
Friday, we'll prep it for publication.
>>
>>  Gregg Kellogg
>>  gregg@greggkellogg.net
>>>  On Nov 19, 2014, at 8:54 AM, Gregg Kellogg <gregg@greggkellogg.net>
wrote:
>>>
>>>  Based on feedback and emerging requirements, I’ve prepared another
draft for an update to the Microdata to RDF Note [1]. As this is a Note of
the Semantic Web Interest Group, please send feedback to semantic-web@w3.org.
This update represents a substantial simplification to the algorithm by
eliminating unused mechanisms and simplifies generation of implied triples
(e.g. schema:additionalType).
>>>
>>>  This Working Draft is an update of the W3C Interest Group Note,
published in October 2012. This update simplifies processing using the
following mechanisms:
>>>
>>>  • Experimental support for @itemprop-reverse has been added. This
attribute is not part of [MICRODATA] and is included as an experimental
feature. Specific feedback from the community is requested. Based on
addoption, the attribute may be considered for inclusion in forthcoming
versions of [MICRODATA] and this note. (see issue 5 [2])
>>>
>>>  • Top-level items were previously included in a md:item RDF Collection
to reconstruct the order that items appear in the DOM. This has also proven
to not be useful and has been dropped. (see issue 6 [3])
>>>
>>>  • A property value may be extracted from the @content attribute of the
meta element. (see issue 7 [4])
>>>
>>>  • A property value may be extracted from the @value attribute of the
data or meter elements. If this value has numeric form, it will produce a
datatyped literal using the appropriate datatype from [XMLSCHEMA11-2] (see
issue 8 [5] and issue 9 [6])
>>>
>>>  • Property URI generation was under control of the propertyURI
registry setting. This setting could previously have taken either the
_vocabulary_ or _contextual_ settings. As _contextual_ was never used in a
registry, and usage in the wild favors the vocabulary setting, support for
_contextua_l has been eliminated, and consequently support for the
propertyURI element within the registry. This issue remains open pending
community review; specifically, anyone depending on this feature should
provide feedback as requested below. (see issue 10 [7])
>>>
>>>  • An item having multiple values for a given property could previously
having been placed in an RDF Collection if the multipleValues registry
setting were set to _list_. Although the previous registry did have such a
setting for some schema.org values, this is not honored by most search
engines, and so has been dropped, and consequently support for the
multipeValues element within the registry. This issue remains open pending
community review; specifically, anyone depending on this feature should
provide feedback as requested below. (see issue 10 [7])
>>>
>>>  • Lastly, the previous update introduced Vocabulary Expansion using
entailment rules adopted from [RDFA-CORE] under control of the
vocab_expansion option. Support for Vocabulary Expansion has been
substantially simplified, and is no longer under control of an option. This
issue remains open pending community review; specifically, anyone depending
on this feature should provide feedback as requested below. (see issue 10
[7])
>>>
>>>  The intention is to publish this draft as a new version of the
Interest Group Note after gathering and incorporating community input.
Please provide feedback by 5 December 2014. Please see GitHub issues for a
discussion of tradeoffs considered in this version.
>>>
>>>  An updated test suite is referenced from the spec. A diff to the
previous revision is available using the ReSpec key-sequence
SHIFT-CTRL-ALT-S when viewing the spec.
>>>
>>>  Gregg Kellogg
>>>  gregg@greggkellogg.net
>>>
>>>  [1] http://w3c.github.io/microdata-rdf
>>>  [2] https://github.com/w3c/microdata-rdf/issues/5
>>>  [3] https://github.com/w3c/microdata-rdf/issues/6
>>>  [4] https://github.com/w3c/microdata-rdf/issues/7
>>>  [5]https://github.com/w3c/microdata-rdf/issues/8
>>>  [6] https://github.com/w3c/microdata-rdf/issues/9
>>>  [7] https://github.com/w3c/microdata-rdf/issues/10
>
> ----
> Ivan Herman, W3C
> Digital Publishing Activity Lead
> Home: http://www.w3.org/People/Ivan/
> mobile: +31-641044153
> ORCID ID: http://orcid.org/0000-0003-0782-2704

--
Charles McCathie Nevile - web standards - CTO Office, Yandex
chaals@yandex-team.ru - - - Find more at http://yandex.com
Received on Monday, 1 December 2014 12:08:28 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 6 January 2015 21:29:46 UTC