Open Repositories and APP Patterns

Dan picks up the baton and kicks off a discussion about Open Repository API issues - cool! I'll start posting my thoughts here as well.

Among the things he mentions:

Define a way to deal with hierachical collections of versioned resources. That is, we need a standard way to model folders and files in AtomPub. This would be of benefit to a lot of people.

Totally agree, this is huge. As I see it this breaks down into several parts:

• How do we indicate that a particular <entry> is in fact a collection (i.e. another feed)? We (WSO2) do this now with a custom extension, but are open to other ideas.
  
• How do we create a sub-feed (i.e. subdirectory)? We do this by POSTing a <feed> instead of an <entry>. I'd like to put that forward as a good option.
• How do we represent versioned URLs as "the same thing"?
  

Other things I'd like to discuss in this realm include standardizing some metadata properties (so I guess I'm agreeing with Dan's instinct to roll this in) - for instance both Galaxy and WSO2 Registry pull some useful information (service names, etc) out from WSDLs that are put into the repository. If we serialized that metadata the same way that would be really nice. I would imagine that we'd come up with a) a standard XML wrapper element for the property bag, and then b) some agreed-upon vocabulary for common properties like XML namespaces and WSDL artifact QNames.

I like Dan's proposed list of interested parties. My guess is that James and the Abdera crew might be very interested in this as well - and I bet that both Dan and I would want whatever appropriate support for this stuff baked in to Abdera if possible, since we both use it heavily.

+1 for a mailing list / wiki, so we can start throwing stuff up on a mutually-editable blackboard. Codehaus is fine, or we're happy to offer space for it as well. Dan, can you get this set up over there, or would you like us to do it?

Mule Galaxy rolls out

Hey, Mule Galaxy goes 1.0!

Congratulations to Dan and the Mule team on the release of their JCR- and APP-powered Registry. I'm looking forward to taking it for a spin, and continue to be very psyched that other vendors are traveling the same road we are with the WSO2 Registry - REST and APP are great foundations on which to build a registry/repository solution.

Despite some of the recent heat between our two companies, I think there are good opportunities for "coopetition", and one of those is definitely in the Registry realm. As Anne mentioned a while back, it might be nice if we got our heads together and thought about some standard models for SOA in a RESTful/APP data store. Simple example - how do I find WSDLs in the Registry which use a particular schema namespace? Can we make that work the same way across both our products?