[DFDL-WG] [DFDL]: First Release of DFDL4S Parser Library
Steve Hanson
smh at uk.ibm.com
Wed May 6 05:23:58 EDT 2015
Dear Michele
my replies below
Regards
Steve Hanson
Architect, IBM DFDL
Co-Chair, OGF DFDL Working Group
IBM SWG, Hursley, UK
smh at uk.ibm.com
tel:+44-1962-815848
From: Michele Zundo <michele.zundo at esa.int>
To: Steve Hanson/UK/IBM at IBMGB
Cc: Maurizio De Bartolomei <Maurizio.De.Bartolomei at esa.int>,
Montserrat Piñol <mpinol at eopp.esa.int>, "Rui Mestre (DME)"
<rui.mestre at deimos.com.pt>, DFDL-WG <dfdl-wg at ogf.org>
Date: 06/05/2015 09:57
Subject: Re: [DFDL]: First Release of DFDL4S Parser Library
Dear Steve,
my answers below.
On 06 May 2015, at 10:49 , Steve Hanson <smh at uk.ibm.com> wrote:
Dear Michele
Good to hear from you. Thank you for letting me know about the latest
developments with S2G Data Viewer.
I am sure the DFDL Working Group would be interested in a demo of S2G.
What is your availability on Tuesdays at 4pm-5pm UK?
I’m currently on mission abroad for the rst of the week, but Tue 12th May
at 16:00 is (for now) a possibility as I should be back in office.
Can we touch base to confirm this next Monday ? (by e-mail).
SMH: Yes that would be fine.
Meantime do you have a document that you could send which summarises which
features of the DFDL language you have used, and some example schemas?
The application and the documentation are free download from our web site
as mentioned below. (
http://eop-cfi.esa.int/index.php/applications/s2g-data-viewer/download)
free registration (no string attached) is required.
Please note that the DFDL 1.0 specification was re-published in October
2014, replacing and obsoleting the version from January 2011. Does S2G
comply with the October 2014 version (
https://www.ogf.org/documents/GFD.207.pdf) ?
do not know. We will have to check. In general I would suggest you
define and update
the document version number and not only the date to make clear that an
update otherwise it
always look like it is version 1.0...
SMH: There is only DFDL version 1.0 and it is October 2014. The original
specification from January 2011 needed many corrections and additions to
the document. However only a few small additions to the actual syntax of
the language. The WG decided to keep the version at 1.0 so that all
existing schemas (mainly written by IBM customers) remained compliant. If
a new release appears in the future then that will be 1.1 or 2.0. I would
guess that the S2G subset is compliant with October 2014 but worth
checking.
Regards
Steve Hanson
Architect, IBM DFDL
Co-Chair, OGF DFDL Working Group
IBM SWG, Hursley, UK
smh at uk.ibm.com
tel:+44-1962-815848
From: Michele Zundo <michele.zundo at esa.int>
To: Steve Hanson/UK/IBM at IBMGB
Cc: Montserrat Piñol <mpinol at eopp.esa.int>, Maurizio De Bartolomei
<Maurizio.De.Bartolomei at esa.int>, "Rui Mestre (DME)" <
rui.mestre at deimos.com.pt>
Date: 29/04/2015 17:38
Subject: [DFDL]: First Release of DFDL4S Parser Library
Dear Steve,
we talked some time ago when we presented the tool we developed at ESA
to inspect satellite TM and which made use of DFDL description for the
binary data
and we have included a number of your comments at the time.
Since then we have further evolved the tool (called S2G Data Viewer) and
produced as well a
standalone version of a Java library which performs the function of
extracting data field from binary data
based on a DFDL description. This library (called DFDL4S i.e. DFDL for
Space) is now available
to anybody interested. It implements only the subset of the Core
capability that we need but I think
it might be nevertheless interesting for the DFDL community.
In future we plan to expand to write capability the same library so user
can serialise their data as
per DFDL description and generate realistically looking (simulated)
satellite data.
The application and the library are available for download at
http:eop-cfi.esa.int
If there is interest we could arrange a short demo of the app (using
webex) or I couldd ask
the developer to show the command line test of the DFDL4S library.
We are very happy/willing to share results/code/etc.
Best Regards
PS we are currently thinking to build “transformation” that can ingest
different type of descriptive
representation and generate the corresponding DFDL schemas.
ESA - European Space Agency
Michele Zundo
Head of Ground System Definition and Verification Office
System Support Division
Earth Observation Project Department
Directorate of Earth Observation Programmes
ESTEC
Kepleerlaan 1, 2200AZ Noordwijk, Netherlands
michele.zundo at esa.int | www.esa.int
T. +31 71 565 3924 | F +31 71 565 3191
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EOP-PEP
European Space Agency, ESTEC
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