Directed graphs

Hi Chuks!

Graphviz.org is very good at producing directed graphs.

An example applied to SKOS:
http://www.destin-informatique.com/scheme/concept.jsp?concept=c_29466&graf=en#Graf
If you look at HTML page source, you will find an HTML comment beginning 
with:
     DOT Input=digraph G {
where the generated commands for Graphviz are shown.

With SVG output, you can make each shape clickable: links are specified 
and generated by Graphviz.

My opinion is that you can make a modelling software where the users can 
edit definitions and have the graph redrawn when requested (or 
periodically).
You do not need "direct edit" within the graph itself (except for 
clicking the shape you want to act upon: a properties' form can then 
pop-up).
I also think GraphViz is good enough at auto layout to not be obliged to 
add precise positioning directives.

But that is a question of taste and colours... What other thinks ? Any 
interaction design, layout or symbols suggestions from the community ?

Good luck!

Christophe

Le 23/07/2012 14:43, Chuks Emma a écrit :
> Hi Guys,
>   I need a great favor from you. Am completely new to SKOS, i have 
> been working on it for less than a month now, reading tons of 
> materials, trying to get a grasp of what it is all about. Now i can 
> say that , at least it makes sense. I have a limited time to 
> understand all this , then try to develop a a Visualization software 
> for SKOS that takes a SKOS file and transforms it into a directed 
> graph of concepts and relationships. I need your help and Guidance 
> because, i honestly dont know how to start. I have spent time learning 
> about apps like protègè, ThManager..etc. I have also spent time on the 
> Jena API for java, trying to get a grip.  If there's anyone out there 
> who has worked on this visualization software before, please come to 
> my aid.
>
> Sincerely,
> Chuks.