Yes you are right that Schematron is a technology that would fill the gap
nicely and in fact is mentioned in the spec for enforcing these rules.
My query is a little more specific in that I understand there is a gap and
there are technologies that can fill this gap (all be it many are far from
complete) but is it 'essential' have the gap filled to be able to claim
ISO19139 compliance?
I assume from your response Andrea, and the fact that GeoNetwork currently
claims to be compliant, that it is not considered 'essential' to enforce
these co-constraints in order to be able to claim compliance.
Cheers,
Michael Gannon.
-----Original Message-----
From: geonetwork-devel-bounces@lists.sourceforge.net
[mailto:geonetwork-devel-bounces@lists.sourceforge.net] On Behalf Of Andrea
Carboni
Sent: Monday, 21 May 2007 8:52
To: geonetwork-devel@lists.sourceforge.net
Subject: Re: [GeoNetwork-devel] ISO19139 conformance rules
inGeoNetwork[SEC=UNCLASSIFIED]
Hi Michael and Pierre,
we planned a two phase validation, one against the XSD schema and another
using
schematron or a simple XSL stylesheet to check the spec constraints.
Actually,
we postponed this feature due to a lack of time and money.
Cheers,
Andrea
Hi Michael,
The rules defined by 19115, but also in 19139 (and in specific use of thses
standards with profiles) can't be all implemented with XSD solutions. The
best solution will be to use a other validation mechanism : Schematron
(http://www.schematron.com/) seems to be the most powerfull to check all
rules and could be included inside the architecture of GN without change the
spirit (XML, XSL).
But I don't know if someone is working of the writing of XSL schematron
files from 19115/19139 rules...
Best regards,
Pierre,
________________________________
De : geonetwork-devel-bounces@lists.sourceforge.net
[mailto:geonetwork-devel-bounces@lists.sourceforge.net] De la part de
Michael.Gannon@anonymised.com
Envoyé : lundi 21 mai 2007 08:02
À : geonetwork-devel@lists.sourceforge.net
Objet : [GeoNetwork-devel] ISO19139 conformance rules in
GeoNetwork[SEC=UNCLASSIFIED]
Hi List,
I have a couple of lofty questions about ISO19115/19139 and how GeoNetwork
interprets the specifications.
Reading ISO19115 there are a number of constraints that fall outside the
control of the XSDs implemented by 19139 (in the official documentation these
are referred to as 'co-constraints' or 'conformance rules'), for example:
"'densityUnits' is mandatory if 'density' is provided".
Does conforming to ISO19139 simply mean that your XML is valid against the
XSDs? Or must the XML hold up to further interrogation to test the
conformance rules in order to claim that is it ISO19139 compliant?
What is the commonly held view in regards to these constraints? And what
does claim does GeoNetwork make in regards to these constraints?
I have the spec here but I am asking as there seems to be some degree of
uncertainty given the language used in this section of the document and I
feel its going to be the ground swell by vendors that will define more
clearly the impact of this section of the documentation.
Cheers,
Michael Gannon.
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