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From Stian Soiland-Reyes <>
Subject Re: [Proposal] Taverna workflow
Date Thu, 23 Oct 2014 02:43:58 GMT
Hi, apologies for replying late.

That is the correct link for the Taverna workshop invitation - or for short.

We have been testing the use of Google+ Hangouts, so we'll try to use
that, with recording/streaming to Youtube.  That could eliviate some
of the timezone issues for anyone who want to join.

The Apache Incubator item is the first point on the agenda, we start
at 2014-10-30 10:00 GMT - which next week will be outside daylight
saving (remember US is still in "summer" time a for a few more weeks
to keep Idaho potato farmers happy)

Provenance exchange - I am thinking in particular if it would be
possible to combine our W3C PROV-O provenance support - (which describes a workflow
run) - with exposing service-level provenance. It is more of a
high-thinking research/collaboration idea, not something that is
specifically needed.

Ideally something like Apache CXF could have a @Provenance method that
would expose a related provenance resource via PROV Links headers -  - and then Taverna workflows using
such a REST service would automatically pick up that provenance
resource and embed/integrate it into the resulting Workflow Bundle -
with a glue record for the different resource identifiers so that it
relates with the rest of the workflow provenance.

Thus one can avoid the 'black box' problem of workflow provenance - or
at least reduce its impact - as the service can provide more specific
provenance as to what it has been doing with its inputs and outputs.

The second half would be where that provenance information would go
afterwards for further exploration.. I must admit that is still a bit
of an open question in the provenance community, beyond "You query it"
or "Make a connected-graph-diagram" (which falls over with >10 steps).
So I am not sure why CouchDB came into my mind - something for
exploring and describing data dependencies would be better suited.

On 17 October 2014 09:54, Bertrand Delacretaz <> wrote:
> Hi,
> I have already voted +1 on the incubation, but I have two nitpicks on
> the proposal:
>> ...    Taverna developer workshop (2014-10-30)..
> It's good to advertise here how people can join - I suppose that's
> ?
>>     Provenance exchange with relevant Apache products (e.g. Apache
>> CXF->Taverna->CouchDB)
> I have no idea what "provenance exchange" means, can you clarify?
> -Bertrand
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Stian Soiland-Reyes, myGrid team
School of Computer Science
The University of Manchester

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