[NeXus-tech] Schema [SEC=UNCLASSIFIED]

[HAUSER, Nick]

My apologies for missing the VC. It is not related to the "temporary"
requirement for me to focus on Bragg Institute operations.

Please note:

Bragg is committed to writing NeXus files in hdf5 and xml format.

Our production systems are writing NeXus files for 6 instruments. We are
as rigorous as possible in our adherence to the standard as "we
interpret it". Bragg fully supports the move from meta-DTD to schema, as
this will remove much of the ambiguity and allow more rigorous
validation. This support currently doesn't extend to funding. This
year's Australian Government budget for ANSTO relates to a 10% decrease
in staffing which has an immediate effect on my team and my role.

Schema generation
How is Freddie travelling with his schema writing? I had a look at 
http://definition.nexusformat.org/schema/1.0/
<http://definition.nexusformat.org/schema/1.0/> . I've attached a zip
file of a conversion done by Ferdi Franceschini to relaxng schema 
http://www.relaxng.org/ <http://www.relaxng.org/>  which was done
generatively from the base classes in Jan 07. This was done with a group
of xslt scripts to refine the metaDTD first to a valid XML file, then to
a schema. rng is the normative form, from which xsd can be generated.
I've also attached the generated NXdetector.xsd. Ferdi will provide more
info on this technique if required. I think it may reduce the workload
significantly.

Regarding Darren and his working on metaDTD to schema translation;
Darren left Bragg in September 07. My management no longer provided
funding to the model server and NeXusBeans projects. Lack of progress &
deliverables was the reason for freezing these projects. Darren is a
skillful architect, and a good developer. His weakness is that he won't
compromise architecture to deliver product. Bragg are using several
patterns and architectures that Darren recommended to us during his time
here, but we are not using any of his source code.

If the NIAC were to use Darren services, I suggest a fixed price
contract of say $20k (200 hours) rather than an hourly rate. With a
fixed price contract, NIAC would run the risk of only partial
completion.

Regards,

Nick.


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