's Blog

As part of his Bachelor Thesis “The application of Wf-XML to scientific workflow: a satellite imaging case study” Philipp Hansen is currently working with us on a proof of concept prototype for WfXML-R at the Stevens Institute of Technology. His advisor there is Michael zur Muehlen.

He is following a two step approach. First step is the implementation of a WfXML-R interface for Sungard’s Carnot Workflow Engine, which already features the ASAP-based Wf-XML for workflow interoperability. This implementation will be tested with scientific workflows within NASA sensor web environment.

The second step is publishing and discovery of available workflows via APP according to the current WfXML-R version.

This will be the fourth implementation of WfXML-R for RESTFul Workflow Engines.

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St Louis, Mar 28, 2008

Just completed a full week of OGC meetings in St Louis. This is the conclusion of OWS-5 (OGC Web Services Interoperability Demo #5) with more than 30 participants.

The NASA SensorWeb is deeply involved in Earth Observation, Natural Resources & Environment. We presented our current ROA-based architecture used to support many pilots and operational demonstrations.

Flip through the presentation on Slideshare and

Watch the first 7mn video here

or this one here as a more technical oriented version (10mn .mov)

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A great article from Sam Bacharach published in Sensors Magazine. The OGC SensorWeb Enablement is picking up some steam. We are greatly appreciative to NASA, one of our sponsors.

The OGC interoperability demonstrations such as OWS-4 and OWS-5, are crucial for standard adoption. As mentioned in the article, our focus for OWS-5 is in enterprise workflow scenarios (geobpms) for national or international emergency response such as fires or floods.

Warning! Your web access to http://eo1.geobliki.com might be declined.

Security has been tightened up for the RESTful OGC Services.

Done as part of OWS-5 interoperability experiment for RESTful services, OAuth 1.0 has been implemented as our security protocol between consumer applications and our web services (sps, wfs, sos). We have made an additional assumption that users could pre-grant access to consumers such as workflows to allow for unattended operations to simplify the protocol one step further. For more information, go to: http://eo1.geobliki.com/pages/oauth

Workflow interoperability is a major concern for the OGC and the WfMC. A simple and RESTful API is critical for early adoption. With the help of John Mettraux of OpenWFE fame, Matt Zukovsky, Keith Swenson and many others, we are documenting this effort dubbed WfXML-R leveraging many years of work done by Keith and the WfMC group.

We need some help and early adopters. Continuous feedback to the nascent specification would be appreciated.

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