This is the archive of the goodrelations dicussion list

> Dear Sir/Madam,
> 
> I am writing to ask a question about using your vocabulary. Is there any way that we could put all meta-data for products in just one external file instead of embedding in every single page?


Yes, you can - e.g. in RDF/XML syntax.

A template for that is here:

   http://code.google.com/p/templates4goodrelations/source/browse/template-rdf.rdf


This is an interesting approach for price comparison engines and for feeding semantic search engines like Sindice.com. 
See also
   http://wiki.goodrelations-vocabulary.org/GoodRelations_for_Price_Comparison_Engines

Unfortunately, it does not work for Google et al., because they prefer a tight integration of the visible with the invisible content and thus honor RDFa only.

But don't worry - embedding the markup in all individual pages does not really make them big or slow:

   http://wiki.goodrelations-vocabulary.org/Frequently_Asked_Questions#Will_the_extra_markup_slow_down_my_page.3F

Q: Will the extra markup slow down my page?

A: No. In comparison to the total size of all components of typical e-commerce Web pages, GoodRelations meta-data will add just 0.5 - 1 % of extra markup. Since HTTP 1.1 supports compression by default and since a part of the page loading times are independent of the size of the content for establishing the connection, even very comprehensive GoodRelations markup typically adds less than 0.2 - 0.5 % (!) to the loading time. This means that for a page loading in 300 ms, the transfer of the rich e-commerce meta-data will at max require additional 2 ms.
This is way beyond what humans are able to spot.

Best

M. Hepp


--------------------------------------------------------
martin hepp
e-business & web science research group
universitaet der bundeswehr muenchen

e-mail:  hepp at ebusiness-unibw.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 GoodRelations for E-Commerce on the Web of Linked Data!
=================================================================
* Project Main Page: http://purl.org/goodrelations/



--------------------------------------------------------
martin hepp
e-business & web science research group
universitaet der bundeswehr muenchen

e-mail:  hepp at ebusiness-unibw.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 GoodRelations for E-Commerce on the Web of Linked Data!
=================================================================
* Project Main Page: http://purl.org/goodrelations/