Re: Vocabulary re-use

Hi Aaron:

> Thanks, Martin.  These recipes are excellent.  Honestly, good 
> documentation seems to be lacking from many published vocabularies.  
> In addition to usage examples, it might also be helpful to data 
> publishers to have instructions on how to extend the vocabulary, e.g. 
> a list of easily extendable properties like foaf:knows, where an 
> ontology developer can neatly define relationships between agents that 
> are specific to their domain.
>
For GoodRelations, such a documentation exists. It explains how you can 
refine the top-level ontology part for product and services types and 
their features by more specific elements for e.e.g. a particular 
vertical domain:

http://www.ebusiness-unibw.org/wiki/Own_GoodRelations_Vocabularies

This is basically the only part of GoodRelations that will regularly 
require domain-specific specializations.

It is also possible to create additional instances for existing classes 
(e.g. new gr:BusinessFunctions). However, this requires a careful 
judgment of the pros and cons, because adding more specificity in here 
may mean that your data will not be properly understood by all applications.

Also note that rdfs-style reasoning, in particular 
rdfs:subclassof/subproperty of is not always available. Yahoo, e.g., 
does not do any reasoning for the moment.

Best
Martin

-- 
--------------------------------------------------------------
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
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Check out GoodRelations for E-Commerce on the Web of Linked Data!
=================================================================

Webcast:
http://www.heppnetz.de/projects/goodrelations/webcast/

Recipe for Yahoo SearchMonkey:
http://tr.im/rAbN

Talk at the Semantic Technology Conference 2009: 
"Semantic Web-based E-Commerce: The GoodRelations Ontology"
http://tinyurl.com/semtech-hepp

Talk at 

Overview article on Semantic Universe:
http://tinyurl.com/goodrelations-universe

Project page:
http://purl.org/goodrelations/

Resources for developers:
http://www.ebusiness-unibw.org/wiki/GoodRelations

Tutorial materials:
CEC'09 2009 Tutorial: The Web of Data for E-Commerce: A Hands-on Introduction to the GoodRelations Ontology, RDFa, and Yahoo! SearchMonkey 
http://tr.im/grcec09