Re: What is the relation of RDF model and E -R model ?

FYI,  the Ontology Definition Metamodel (ODM -- and thanks for the plug) 
is now an adopted standard at OMG.  The reference to the final adopted 
specification, which is publicly available, is [1].  In an appendix, we 
do talk about the bridge between what's currently available in UML for 
ER and what extensions would be required in order to use the ODM to map 
to ER, namely a representation for keys / identity.  See Annex B in [1] 
for detail.

Having said this, there is also work underway on a new Information 
Management Metamodel (IMM) at OMG, which will replace parts of the 
current (aging) common warehouse metamodel (CWM), that will include a 
new standard for ER notation -- something that has been sorely lacking 
for a long time, even though there are a number of de facto 
commonalities across current approaches.  Once the ER metamodel and 
profile for IMM are stable, we plan to map that to the metamodels for 
RDF, OWL, Topic Maps, and Common Logic in ODM  The work is in progress, 
though I can't provide an exact timeline for completion.  My sense at 
this point is that there will be a final version of the specification in 
the first half of next year.

Best regards,

Elisa

[1] http://www.omg.org/cgi-bin/doc?ptc/2006-10-11

Content-wire Research wrote:

> Hi Fj
> when comparing different models, I find the Ontology Reference 
> Metamodel most helpful, a link below
> let us know if it answers your questions!
> F]
>
>
>     Ontology Definition MetaModel
>     <http://codip.grci.com/odm/draft/submission_text/ODMPrelimSubAug04R1.pdf>
>
> File Format: PDF/Adobe Acrobat - View as HTML 
> <http://72.14.235.104/search?q=cache:S_BAXh4Vz4EJ:codip.grci.com/odm/draft/submission_text/ODMPrelimSubAug04R1.pdf+ontology+metamodel&hl=en&ct=clnk&cd=4>
> The metamodel(s) for ontology definition specified herein .... The 
> Ontology Development Metamodel is a software design project. Any 
> software ..
>
> codip.grci.com/odm/draft/submission_text/ODMPrelimSubAug04R1.pdf - 
> Similar pages 
> <http://www.google.com/search?hl=en&pwst=1&q=related:codip.grci.com/odm/draft/submission_text/ODMPrelimSubAug04R1.pdf> 
> - Note this 
> <http://www.google.com/search?hl=en&q=ontology+metamodel&btnG=Google+Search#>
>
>  
> Paola Di Maio
>
>     ----- Original Message -----
>     From: fjnuer@126.com <mailto:fjnuer@126.com>
>     To: semantic-web@w3.org <mailto:semantic-web@w3.org>
>     Sent: Wednesday, August 01, 2007 4:57 PM
>     Subject: What is the relation of RDF model and E -R model ?
>
>     Entity-Relationship (ER) model
>     http://www.utexas.edu/its/windows/database/datamodeling/dm/erintro.html
>      
>      
>     WHo can tell me?
>      
>      
>
>
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>     ? ? ? ? ? ?,? ? ? ? ? ?
>     <http://event.mail.163.com/chanel/xyq.htm?from=126_NO6>
>