On Wed, May 28, 2014 at 10:33:46AM -0400, Chalk, Stuart wrote:
> Anyone seen this error before and know of a solution?
>
> The schema I am using is attached. It imports the Dublin Core
> metadata (dcterms) schema for recording bibliographic information.
>
> The dcterms schema is a valid schema in oxygenxml v 16, yet if I
> take it out the errors go away.
>
> Thoughts?
>
Stuart,
I've done a little debugging on this. And, I actually have a patch.
However, I'm suspicious about this patch. Here's a little
explanation:
The error that I get when I try to process that schema is:
RuntimeError: maximum recursion depth exceeded
The infinite loop happens because this schema contains a
substitutionGroup that contains itself. [1] Or, perhaps not. It
looks to me as though there is a member of the substitutionGroup has
the same name as the head of that substitutionGroup but is in a
different namespace:
<xs:element name="title" substitutionGroup="dc:title"/>
However, generateDS.py is not good at separating out multiple
namespaces. So, you will have to check to see whether the generated
code works for you. I do not have an XML instance document, so I
can't do that test myself.
At any rate, I've added a check so that when we run generateDS.py,
we're protected against that infinite loop and are able to generate
a module.
I've pushed this fix to Bitbucket. You can find it here:
https://bitbucket.org/dkuhlman/generateds
As a bit of additional explanation, and admittedly this is excuse
making, since generateDS.py generates a single module, it can only
generate one class with a given name, even if the schema defines
multiple types with the same name but in different namespaces. I
suppose that a possible solution would be to generate multiple
modules for different namespaces and link them with Python "import"
statements. That would require some major reworking of
generateDS.py, I believe.
If this is an issue for you, I don't know whether there is some
reasonable way to *manually* generate separate modules for each
namespace (if those namespaces are defined in separate schema
files). I suspect that doing so would involve some serious patching
of the generated files. If you decide to try this, you may want to
look at the following command line options:
--one-file-per-xsd Create a python module for each XSD processed.
--output-directory="XXX" Used in conjunction with --one-file-per-xsd.
The directory where the modules will be created.
--module-suffix="xxx" To be used in conjunction with --one-file-per-xsd.
Append XXX to the end of each file created.
Look here for more information on that:
http://www.davekuhlman.org/generateDS.html#one-per-generating-separate-files-from-imported-included-schemas
Hope this helps. Let me know if you have suggestions or questions,
and especially whether this works for you or what you did to make
it work.
Dave
[1] As a recovering philosophy major, I know that we cannot allow
sets that contain themselves. See this Wikipedia page if you
want to foolishly spend time on that:
http://en.wikipedia.org/wiki/Russell%27s_paradox
--
Dave Kuhlman
http://www.davekuhlman.org
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