Re: Facebook's new Graph Search: An endorsement of the RDF approach to healthcare data?

On 1/18/13 1:14 PM, Michael Miller wrote:
> hi kingsley,
>
> neo4j is a nosql graph database with (my knowledge is limited so please
> forgive if i misspeak) attributes for nodes, including type, and
> attributes for edges.
>
> RDF is actually just triples, the syntax the RDF is expressed in is the
> notation and the data model is implicit, if i understand right, but can be
> captured by an ontology.  you can only really express a 'subject->
> predicate -> (object|primitive)' as a single triple but triples can be
> linked together by a common subject, which gives that subject multiple
> 'attributes' or by a common object and subject which allows traversal.
>
> a general graph allows a subject to have multiple predicates specified for
> it, which is the major difference from RDF.  it also can represent a data
> model, ours certainly does with proteins, genes and drugs being some of
> the objects
>
> in fact i believe there is a fairly straight-forward translation between
> RDF and the more general graph.  tinkerpop can go from RDF to neo4j
> amongst other graph databases [1].  there's also a great thread on
> performance tuning for loading triples [2] into neo4j.
>
> i didn't find much on general graphs to RDF but there is a fair amount of
> information for conceptual graphs to RDF [3].
>
> i think what makes neo4j a better choice for us is that, for example, when
> a search is preformed, there will be a constraint on what type of node(s)
> and what type of edge(s) should be traversed.  neo4j is very good at
> allowing  us to make indices based on the type of edge or node.
>
> cheers,
> michael
>
> [1] http://java.dzone.com/news/rdf-data-neo4j-tinkerpop-story
> [2]
> https://groups.google.com/forum/?fromgroups#!searchin/neo4j/rdf/neo4j/g8bV
> 8w3LH9E/WIgx5GP14KAJ
> [3]
> http://www.google.com/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=2&cad=r
> ja&ved=0CEYQFjAB&url=http%3A%2F%2Fwww.lirmm.fr%2F~croitoru%2Frdfs.pdf&ei=L
> Xr4UKmTPJDZigK22oDgDg&usg=AFQjCNGMzLXob8zCs0-j_85uFtR_a6Y26Q

You might find the following useful:

1. http://vschart.com/compare/openlink-virtuoso/vs/neo4j-community
2. 
https://groups.google.com/forum/?fromgroups=#!topic/gremlin-users/Li5kynhJgB0
3. http://stackoverflow.com/questions/3537561/neo4j-vs-openlink-virtuoso
4. http://tinyurl.com/b3zo24l -- benchmark report that includes Neo4j .

Kingsley
>
>> -----Original Message-----
>> From: Kingsley Idehen [mailto:kidehen@openlinksw.com]
>> Sent: Thursday, January 17, 2013 1:38 PM
>> To: public-semweb-lifesci@w3.org
>> Subject: Re: Facebook's new Graph Search: An endorsement of the RDF
>> approach to healthcare data?
>>
>> On 1/17/13 1:45 PM, Michael Miller wrote:
>>> the developer who wrote the app looked at RDF but settled on neo4j
>> because
>>> it seemed to scale better.
>> RDF is a framework comprised of:
>>
>> 1. Data Model
>> 2. Syntax
>> 3. Notations.
>>
>> How do you compare that with an DBMS product? The comparison isn't like
>> for like.
>>
>> --
>>
>> Regards,
>>
>> Kingsley Idehen
>> Founder & CEO
>> OpenLink Software
>> Company Web: http://www.openlinksw.com
>> Personal Weblog: http://www.openlinksw.com/blog/~kidehen
>> Twitter/Identi.ca handle: @kidehen
>> Google+ Profile: https://plus.google.com/112399767740508618350/about
>> LinkedIn Profile: http://www.linkedin.com/in/kidehen
>>
>>
>>
>>
>
>


-- 

Regards,

Kingsley Idehen	
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
Personal Weblog: http://www.openlinksw.com/blog/~kidehen
Twitter/Identi.ca handle: @kidehen
Google+ Profile: https://plus.google.com/112399767740508618350/about
LinkedIn Profile: http://www.linkedin.com/in/kidehen