Using catalog file to import schemas locally

I have several XML schemas which import other schemas from
Internet-
based locations, i.e.:

    <import namespace="http://indivo
.org/xml/phr/contact"
    schemaLocation="http
://indivo.org/xml/phr/contact.xsd"/>

This works fine when the schemaLocation actually exists, but
for
software-in-development, that's not always the case.  In
such
situations, our practice is to use a catalog file, which
will contain
entries like:

    SYSTEM "http://in
divo.org/xml/phr/contact.xsd"
"./contact.xsd"

(Ours are OASIS TR9401 catalogs, but there's no reason we
couldn't be
using XML catalogs.)

This informs a schema consumer that any references to a URL
should
instead be retrieved from another location, in this example,
a local
file.  More info here:
http://xml.apache.org/com
mons/components/resolver/resolver-article.html#s.catalog.fil
es

Is there any way I can use a catalog file with SDO/DAS, or
mimic such
functionality?

Thank you kindly,
Jonathan Abbett


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On 4 May, 20:34, jabbett <abb...gmail.com> wrote:
> I have several XML schemas which import other schemas
from Internet-
> based locations, i.e.:
>
>     <import namespace="http://indivo
.org/xml/phr/contact"
>     schemaLocation="http
://indivo.org/xml/phr/contact.xsd"/>
>
> This works fine when the schemaLocation actually
exists, but for
> software-in-development, that's not always the case. 
In such
> situations, our practice is to use a catalog file,
which will contain
> entries like:
>
>     SYSTEM "http://in
divo.org/xml/phr/contact.xsd"
"./contact.xsd"
>
> (Ours are OASIS TR9401 catalogs, but there's no reason
we couldn't be
> using XML catalogs.)
>
> This informs a schema consumer that any references to a
URL should
> instead be retrieved from another location, in this
example, a local
> file.  More info here:http://xml.apache.org/commons/components
/resolver/resolver-article.ht...
>
> Is there any way I can use a catalog file with SDO/DAS,
or mimic such
> functionality?
>
> Thank you kindly,
> Jonathan Abbett
Hi Jonathan. I dont't know off the top of my head. There has
been some
work done recently on caching XML schema in the SCA
implementation but
I don't believe this extended to referring to catalog
entries.
Although I may be wrong.  I'm hoping Matthew will jump in
here and
correct me as he did the caching work. Our SDO
implementation is based
on the Tuscany SDO implementation (which in turn uses
Libxml2 under
the covers) so I'll go an have a look and see if it supports
catalogs.

Regards

Simon


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