Hi Stéphane,
I think it's wrong to advocate "Use RDFa in Snippet Style rather
than combining visible markup and RDFa data markup." straight off
the bat - this might be a good advice in some cases, but saying that
without any disclaimer or context is misleading. People should first
look at integrating RDFa inline with their content and use the
snippet style when appropriate. The RDFa specs have lots of examples
which applies to inline HTML+RDFa, and if you look around you will
see that a lot of webpages have inline RDFa (foaf profiles,
licensing). RDFa snippets might work better for ecommerce, but
please don't generalize.
I am not religious about this, and the origial document is part of the
GoodRelations cookbook.
Two remarks, however:
1. If you have dynamically populated Web page templates, e.g. in
Django-style, then all of the arguments re consistency between visible
content and meta-data in case of changes become irrelevant, because
mentioning the same variable once or twice does not make any difference.
2. For non-trivial data-structures, properly weaving in RDFa into
existing (!) XHTML markup is an intellectually very challenging job,
in particular if the organisation of the existing markup for visible
content does not naturally match the structure of the data.
Also note that many sites have pretty complicated, pre-existing
(X)HTML templates; they do not start from scratch. Look at the
ovestock.com page at
http://www.overstock.com/Electronics/Bell-and-Howell-DV550UW-12MP-Digital-Video-Camera-with-Underwater-Housing/4450313/product.html
3. As for the impact on the page size you have to consider that
duplicate content will compress very well.
The only argument in favor of combining visible content and meta-data
that I really accept is that this provides a slightly higher barrier
for manipulative search engine optimization by using different content
for the visible and the invisible payload. But it's on the other hand
easy for a search engine to spot and punish sites that use e.g. a
lower price in the meta-data than shown on the page.
Martin
On 26.10.2010, at 21:10, Stéphane Corlosquet wrote:
Martin,
2010/10/26 Martin Hepp <[email protected]>
Hi all:
A while ago, I compiled a few recommendations and links regarding
RDFa authoring at
http://www.ebusiness-unibw.org/wiki/RDFaAuthoring
I think it's wrong to advocate "Use RDFa in Snippet Style rather
than combining visible markup and RDFa data markup." straight off
the bat - this might be a good advice in some cases, but saying that
without any disclaimer or context is misleading. People should first
look at integrating RDFa inline with their content and use the
snippet style when appropriate. The RDFa specs have lots of examples
which applies to inline HTML+RDFa, and if you look around you will
see that a lot of webpages have inline RDFa (foaf profiles,
licensing). RDFa snippets might work better for ecommerce, but
please don't generalize.
Steph.
Best
Martin
On 23.10.2010, at 15:32, Ivan Herman wrote:
Thanks Pablo, this is indeed (in my view) one of the way to get
these recorded. Anybody has a problem adding an item, I am happy to
help!
And yes, great answers. Some of these things I did not know about
either!
Thanks
Ivan
On Oct 21, 2010, at 18:40 , Pablo Mendes wrote:
It would be nice to have them at:
http://www.w3.org/2001/sw/wiki/RDFa
For those willing to go the extra mile and add their tool to the wiki:
http://www.w3.org/2001/sw/wiki/Tool_Contributors
Cheers,
Pablo
On Thu, Oct 21, 2010 at 5:16 PM, Juan Sequeda
<[email protected]> wrote:
Great responses.
Keep them coming!!
Juan Sequeda
+1-575-SEQ-UEDA
www.juansequeda.com
On Thu, Oct 21, 2010 at 9:24 AM, Rene Kapusta
<[email protected]> wrote:
Aloha!
We are currently working very hard on a new RDFa / Semantic
Annotation Plugin for http://aloha-editor.com (the prototype steph.
mentioned was just a quick hack to see how aloha editor is working;
to try a first integration in drupal and annotate the content with
simple http://commontag.org RDFa data with suggestions from Zemanta).
Here are some details about the features/roadmap about the new plugin:
http://aloha-editor.com/wiki/index.php/Semantic_Annotation
We have now decided to use (and contribute back to) rdfQuery, a
really nice jQuery RDF extension, for the new Annotation plugin:
http://code.google.com/p/rdfquery/
Aloha Editor will also very likely be used und extended/improved at
the EU funded IKS Project as Semantic Editor:
http://wiki.iks-project.eu
If you have any suggestions, wishes, questions or would like to get
involved in the RDFa plugin for the online editor project -- "the
world's most advanced browser based editor" -- we would love to here
from you!
Contact of the leader of the Aloha Editor project:
Haymo Meran, [email protected]
Best regards & have a nice day,
Rene
2010/10/21 Martin McEvoy <[email protected]>
On 21 October 2010 00:29, Eric Franzon <[email protected]
> wrote:
I also recall a Dreamweaver extension by Martin McEvoy from a couple
years ago. I don’t know the current status of this extension, but
it is called “RDFa Documents.” That said, I found it relatively
easy to add RDFa to existing HTML documents using Dreamweaver even
without this extension..
RDFa Documents is available from
http://www.adobe.com/cfusion/exchange/index.cfm?event=extensionDetail&extid=1759526
Its a little outdated so far it only supports RDFa 1.0.
I am planning to release a new version for RDFa 1.1 sometime in the
next couple of months.
Best Wishes
Martin.
--Eric
[email protected]
From: [email protected] [mailto:semantic-web-
[email protected]] On Behalf Of Stéphane Corlosquet
Sent: Wednesday, October 20, 2010 2:42 PM
To: Juan Sequeda
Cc: Semantic Web; public-lod; Jean-François Hovinne; Rene Kapusta
Subject: Re: RDFa editors
Not sure whether you mean wysiwyg style editor, but you can check
these two, both are prototypes when it comes to RDFa at this stage
afaik.
WYMeditor - http://wymeditor.org/ - which integrates with Drupal,
Rails, Django, or WordPress. Prototype: http://files.wymeditor.org/wymeditor/trunk/src/examples/15-rdfa-editor.html
(I'm cc'ing Jean-François who might be able to give some updates)
There is also the very recent Aloha editor with a RDFa prototype at http://aloha-drupal.evo42.net/moc/node/9
(cc'ing Rene who might be able to give some updates).
Steph.
On Wed, Oct 20, 2010 at 5:12 PM, Juan Sequeda
<[email protected]> wrote:
Hi Everybody
I want to add RDFa into my HTML. What is the easiest way to do this?
What are the RDFa editors out there? I know of loomp.org, but it
seems like it is still in private testing.
Thanks
Juan Sequeda
+1-575-SEQ-UEDA
www.juansequeda.com
----
Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
mobile: +31-641044153
PGP Key: http://www.ivan-herman.net/pgpkey.html
FOAF: http://www.ivan-herman.net/foaf.rdf
