We've released the first version of working draft for the IVOA
Provenance Data Model at the IVOA documents page:
ProvenanceDM Working draft.
Updated versions will be put at the same URL (check the date! The first
version is from 21st November 2016).
Want to get your hands on the very latest version? Check out the
volute svn repository! Since it's not so
easy to find what you want there, here's the path to the Provenance
Data Model at volute, and
here's a direct link to the latest development draft [pdf].
We're happy to receive some feedback on the document via IVOA's data
modelling mailing list dm@ivoa.net.
UWS stands for Universal Worker Service and is an IVOA standard provides
a protocol which can be used for accessing databases and other web
services from the command line, e.g. using the python uws-client. This allows to
create (asynchronous) jobs for a web service (e.g. an SQL query), check
their status, retrieve their results, abort or delete them.
The updated version 1.1 was approved at the InterOperability Meeting
last week and brings some nice new features:
- Job list filtering: When retrieving the job list, one can now
retrieve only jobs created after a certain date, the latest n jobs or
jobs with a certain phase (e.g. EXECUTING or COMPLETED)
- WAIT: When asking for job details, it is now possible to append a
WAIT parameter and provide an integer as wait-time in seconds. This
means that the job details will only be returned when the wait-time is
over or the job's phase has changed, whichever comes first.
For all the details, have a look at the standard itself:
UWS 1.1 Recommendation.
A few examples using the CosmoSim database are given here:
UWS tutorial for CosmoSim (pdf), using 1.0 and
UWS 1.1 update at CosmoSim.
And if you want to implement UWS 1.1 for your own service, here is a test-tool that may be useful for validating for you for validating the new features:
uws-validator.
We were taking part at this year's ADASS meeting (Astronomical Data Analysis Software
and Systems) in Trieste and contributed a talk on the Provenance Data
Model
for the data model session.
The ADASS meeting was followed by the Northern Fall Interoperability
Meeting of
the IVOA, where new standards and protocols were being discussed.
It was a quite long week, but very inspiring!!
You can find us right now at our booth at the AG-Tagung in Bochum! See
here for some pictures:
GAVO booth
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