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

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
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>
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> ========================================================================
>
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>
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>
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>
>
>
>
>

Received on Saturday, 27 June 2009 10:25:53 UTC