Thanks for the reply, Stuart.  With the first question, I've updated the diagram to add an "Association" entity.  (Technically, I don't think this is an entity but rather a specialization of a relationship.)  This is based off some great work I saw at the NITRC.  Take a look at the "Associations" section of these page:

  http://www.nitrc.org/projects/fcon_1000/
  http://www.nitrc.org/projects/fsl/

This fits the use case you describe and that of modules that would be a part of a Drupal installation or how djatoka can be a component of several different projects.

Regarding the second question, I think of standards as a kind of "technology".  I've added "standard" to the list of enumerations at http://wiki.code4lib.org/index.php/Registry_E-R_Diagram


Peter

On Aug 3, 2011, at 7:06 PM, stuart yeates wrote:
> Two points:
> 
> (1) The model seems appears not to capture "Project A builds on Project 
> B" This will make the model less-than-optimal for comparing (for 
> example) an open source Project A with an propriety Project B when B is 
> a fork of A.
> 
> (2) Standards. They appear not to be mentioned at all.
> 
> cheers
> stuart



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