[pycsw-devel] gmd schema 2005 broken? Schemas parser error

[Jachym Cepicky]

Hi,

yes, the apiso.xsd worked -thanks a lot

po 5. 10. 2015 v 21:47 odesílatel Tom Kralidis <tomkralidis at gmail.com>
napsal:

> Hi Jachym: comments interleaved:
>
> On Sat, Oct 3, 2015 at 11:35 AM, Jachym Cepicky
> <jachym.cepicky at gmail.com> wrote:
> > hi tom,
> >
> > in PyWPS-4 we will have exactly this option for Inputs - they may pass
> the
> > validation based on configuration. I think, it is good feature to have in
> > order to have your (meta)data records in shape.
> >
>
> If you can file a GitHub issue
> (https://github.com/geopython/pycsw/issues/new), that would be great.
>
> > However, I would say, this problem happens *before* the record get's
> > validated.
> >
> > What profile (namespace) are you guys using for your geospatial metadata
> (of
> > data and services)?
> >
>
> pycsw generally leaves that up to the metadata provider.  For ISO,
> generally:
>
> 19139 (data): http://www.isotc211.org/2005/gmd/gmd.xsd
> 19119 (services):
> http://schemas.opengis.net/iso/19139/20060504/srv/srv.xsd
>
> Note that the CSW ISO Application Profile provides
> http://schemas.opengis.net/csw/2.0.2/profiles/apiso/1.0.0/apiso.xsd as
> a convenience to support both data and services.
>
> Having said this, when I make some changes (invalid ISO dates,
> ordering of some elements, invalid xs:ID values), your metadata
> document in your example URL validates with no problem against
> http://schemas.opengis.net/csw/2.0.2/profiles/apiso/1.0.0/apiso.xsd
>
> Hope this helps.
>
> ..Tom
>
>
> > Thanks
> >
> > jachym
> >
> > P.S. Sorry, if my questions seem odd - I'm quite new to practical usage
> of
> > this field
> >
> > so 3. 10. 2015 v 14:54 odesílatel Tom Kralidis <tomkralidis at gmail.com>
> > napsal:
> >>
> >> Hi Jachym: looks like the metadata record itself is not valid.  CSW
> >> itself leaves GetRecords and GetRecordById responses relatively open
> >> (either the default Dublin Core + ows:BoundingBox, or anything else),
> >> given the various metadata formats.
> >>
> >> pycsw does not perform XML validation when ingesting metadata records
> >> (either via CSW-T operations or via the pycsw-admin.py load_records
> >> command).  Rather, pycsw parses the metadata record (assuming it's a
> >> supported format, else throws an error) and inserts it into the
> >> repository.
> >>
> >> Note you can use pycsw-admin.py to validate XML records before insertion
> >> with:
> >>
> >> pycsw-admin.py -c validate_xml -x file.xml -s file.xsd
> >>
> >> Or you can use the pycsw API (assuming 1.10.2) like:
> >>
> >> from pycsw.admin import validate_xml
> >> result = validate_xml(xml_filepath, xsd_filepath)
> >>
> >> Having said this, we never turned on validating parsers when ingesting
> >> metadata records given the reality that many / most are not XML valid.
> >> As enhancement, we could provide a configuration setting which turns
> >> on strict mode validation when ingesting metadata records into pycsw,
> >> like:
> >>
> >> metadata_validation=off|warn|strict
> >>
> >> What do folks think?
> >>
> >> ..Tom
> >>
> >>
> >> On Fri, Oct 2, 2015 at 5:12 PM, Jachym Cepicky <
> jachym.cepicky at gmail.com>
> >> wrote:
> >> > Hi all,
> >> >
> >> > I would like to validate some records from our PyCSW instance, but it
> >> > seems,
> >> > that the schemas are broken ? I test on Linux command line and python
> >> > lxml
> >> > with the same result:
> >> >
> >> > # download the metadata record
> >> > $ wget -O record.xml
> >> >
> >> > "
> http://geosense.cz/cgi-bin/csw.py?service=CSW&version=2.0.2&Request=GetRecordById&id=CZ-29002567-srv-jedinecny_nazev_sluzby&outputSchema=http://www.isotc211.org/2005/gmd&elementSetName=full
> "
> >> >
> >> > # create local xsd schema file
> >> > $ cat << EOF > schema.xsd
> >> > <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
> >> > targetNamespace="http://www.isotc211.org/2005/srv"
> >> > elementFormDefault="qualified" version="0.1">
> >> > <xs:include
> >> >
> >> > schemaLocation="
> http://schemas.opengis.net/iso/19139/20060504/srv/serviceMetadata.xsd"/>
> >> > </xs:schema>
> >> > EOF
> >> >
> >> > # finally test the schema
> >> > $ xmllint --schema schema.xsd record.xml  --noout
> >> >
> >> > result:
> >> >
> >> >
> >> >
> http://schemas.opengis.net/iso/19139/20060504/gml/coordinateOperations.xsd:48
> :
> >> > element element: Schemas parser error : Element
> >> > '{http://www.w3.org/2001/XMLSchema}element', attribute 'ref': The
> QName
> >> > value '{
> http://www.isotc211.org/2005/gmd}AbstractDQ_PositionalAccuracy'
> >> > does
> >> > not resolve to a(n) element declaration.
> >> > WXS schema schema.xsd failed to compile
> >> >
> >> > Any hint? Do I use proper version of XSD?
> >> >
> >> > Thanks for hint
> >> >
> >> > Jachym
> >> >
>
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