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Re: .htaccess a major bottleneck to Semantic Web adoption / Was: Re: RDFa vs RDF/XML and content negotiation

From: Melvin Carvalho <melvincarvalho@gmail.com>
Date: Sat, 27 Jun 2009 12:25:18 +0200
Message-ID: <9178f78c0906270325o37514070i65e1767d96a67ba1@mail.gmail.com>
To: martin.hepp@ebusiness-unibw.org
Cc: Kingsley Idehen <kidehen@openlinksw.com>, Mark Birbeck <mark.birbeck@webbackplane.com>, public-lod@w3.org, semantic-web at W3C <semantic-web@w3c.org>
On Sat, Jun 27, 2009 at 9:21 AM, Martin Hepp
(UniBW)<martin.hepp@ebusiness-unibw.org> wrote:
> So if this "hidden div / span" approach is not feasible, we got a problem.
>
> The reason is that, as beautiful the idea is of using RDFa to make a) the
> human-readable presentation and b) the machine-readable meta-data link to
> the same literals, the problematic is it in reality once the structure of a)
> and b) are very different.
>
> For very simple property-value pairs, embedding RDFa markup is no problem.
> But if you have a bit more complexity at the conceptual level and in
> particular if there are significant differences to the structure of the
> presentation (e.g. in terms of granularity, ordering of elements, etc.), it
> gets very, very messy and hard to maintain.
>
> And you give up the clear separation of concerns between the conceptual
> level and the presentation level that XML brought about.
>
> Maybe one should tell Google that this is not cloaking if SW meta-data is
> embedded...
>
> But the snippet basically indicates that we should not recommend this
> practice.

What happens if you put them in one big <span> tree and use the
@content attribute?

>
> Martin
>
>
> Kingsley Idehen wrote:
>>
>> Mark Birbeck wrote:
>>>
>>> Hi Martin,
>>>
>>>
>>>>
>>>> b) download RDFa snippet that just represents the RDF/XML content (i.e.
>>>> such
>>>> that it does not have to be consolidated with the "presentation level"
>>>> part
>>>> of the Web page.
>>>>
>>>
>>> By coincidence, I just read this:
>>>
>>>  Hidden div's -- don't do it!
>>>  It can be tempting to add all the content relevant for a rich snippet
>>>  in one place on the page, mark it up, and then hide the entire block
>>>  of text using CSS or other techniques. Don't do this! Mark up the
>>>  content where it already exists. Google will not show content from
>>>  hidden div's in Rich Snippets, and worse, this can be considered
>>>  cloaking by Google's spam detection systems. [1]
>>>
>>> Regards,
>>>
>>> Mark
>>>
>>> [1]
>>> <http://knol.google.com/k/google-rich-snippets/google-rich-snippets/32la2chf8l79m/1#>
>>>
>>>
>>
>> Martin/Mark,
>>
>> Time to make a sample RDFa doc that includes very detailed GR based
>> metadata.
>>
>> Mark: Should we be describing our docs for Google, fundamentally? I really
>> think Google should actually recalibrate back to the Web etc..
>>
>>
>
> --
> --------------------------------------------------------------
> martin hepp
> e-business & web science research group
> universitaet der bundeswehr muenchen
>
> e-mail:  mhepp@computer.org
> phone:   +49-(0)89-6004-4217
> fax:     +49-(0)89-6004-4620
> www:     http://www.unibw.de/ebusiness/ (group)
>        http://www.heppnetz.de/ (personal)
> skype:   mfhepp twitter: mfhepp
>
> Check out the GoodRelations vocabulary for E-Commerce on the Web of Data!
> ========================================================================
>
> Webcast:
> http://www.heppnetz.de/projects/goodrelations/webcast/
>
> Talk at the Semantic Technology Conference 2009: "Semantic Web-based
> E-Commerce: The GoodRelations Ontology"
> http://tinyurl.com/semtech-hepp
>
> Tool for registering your business:
> http://www.ebusiness-unibw.org/tools/goodrelations-annotator/
>
> Overview article on Semantic Universe:
> http://tinyurl.com/goodrelations-universe
>
> Project page and resources for developers:
> http://purl.org/goodrelations/
>
> Tutorial materials:
> Tutorial at ESWC 2009: The Web of Data for E-Commerce in One Day: A Hands-on
> Introduction to the GoodRelations Ontology, RDFa, and Yahoo! SearchMonkey
>
> http://www.ebusiness-unibw.org/wiki/GoodRelations_Tutorial_ESWC2009
>
>
>
>
>
Received on Saturday, 27 June 2009 10:25:53 UTC

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