Hi,

This sounds really interesting. I would definitely like to see the implementation both for the property graph and for the traversal language. And to have it available as open source under a Pharo-friendly license (MIT preferably) :).

In particular, I am curious about the language.

My implementation does not have these ambitions. I merely wanted to reach objects using a simple traversal (btw, I only implemented a breadth-first strategy) expressed in blocks, but having a more declarative query language would be interesting indeed.

Could you give us more details?

Cheers,
Doru


On Wed, Dec 11, 2013 at 4:54 PM, Sam Adams <ssadams@us.ibm.com> wrote:

Hi Doru,
I've been observing how the graph support in Moose has been developing.
We in IBM Research have implemented a full Pharo implementation of the TinkerPop Blueprints property graph de-facto standard http://www.tinkerpop.com .
I am also completing a Pharo-binding for the Gremlin graph traversal language that I call Glider (What you get when you cross a Gremlin and a Mouse).  Its very compact and a bit weird syntactically, but its very powerful.  Smells kinda like APL for graphs.
If the community is interested, we could go through the IBM Open Source clearance process in the new year and see if we can contribute.
Regards,
Sam

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Inactive hide details for Tudor Girba ---12/11/2013 10:22:50 AM---Hi, I put together a little implementation for traversals. ItTudor Girba ---12/11/2013 10:22:50 AM---Hi, I put together a little implementation for traversals. It is inspired by an

From: Tudor Girba <tudor@tudorgirba.com>
To: moose-dev <moose-dev@iam.unibe.ch>, Discusses Development of Pharo <pharo-dev@lists.pharo.org>
Date: 12/11/2013 10:22 AM
Subject: [Moose-dev] [ANN] traversal-enabled objects with DeepTraverser
Sent by: moose-dev-bounces@iam.unibe.ch




Hi,

I put together a little implementation for traversals. It is inspired by an original implementation from Mariano. Using DeepTraverser, you can traverse arbitrary graphs by describing the traversal and by specifying the actions you want to perform on the nodes and relations.

The code is available in the Moose image as part of the MooseAlgos subproject, but can also be loaded separately in a Pharo image via:

Gofer new
   url: 'http://www.smalltalkhub.com/mc/Moose/DeepTraverser/main';
   package: ‘ConfigurationOfDeepTraverser’;
   load.
(Smalltalk globals at: #ConfigurationOfDeepTraverser) loadDevelopment.


Just to give you an idea, here are some representative examples:

Number
    deep: #subclasses 
    do: [:each | Transcript show: each; cr].

Number deepCollect: #subclasses.

Number
    deep: #subclasses 
    collect: #name.

Number 
    deep: #subclasses 
    do: [:each | Transcript show: each; cr]
    relationDo: [ :from :to | Transcript show: from; show: ' <-- '; show: to; cr ].



More details about the usages and a little description of the implementation can be found  here:
http://www.humane-assessment.com/blog/traversal-enabled-pharo-objects/


Cheers,
Doru



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"Every thing has its own flow"