Support for versioning?

[cmoller <ch...@gmail.com>]

Does XML Beans have a solution planned for XSD versioning beyond custom class
loaders? Specifically, is there any plan to support
http://www.w3.org/2007/XMLSchema-versioning based versioning?

I have control over the XSD that will be versioned, but I need to be able to
accept files for older versions alongside new files. Are my only options a
custom class loader, versioning in the namespace, or versioning in element
names?
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Re: Support for versioning?

[Anthony Coates <ab...@googlemail.com>]

Be aware that the W3C's versioning stuff, as in your link, is for allowing
you to work with different versions of the XML Schema *specification*.  I
suspect that you want to work with different versions of a particular XML
Schema, not different versions created using different versions of the
specification.

To the best of my knowledge, XMLBeans does not provide any support for this.
 Versioning the namespace will work.  If you wanted to keep the same
namespace across versions but communicate the version information in the XML
some other way, I think you would have to pre-parse some the XML (e.g. with
SAX), determine the version, and then use a classloader to load the correct
version.

What I see people doing quite a bit now is to change the namespace only for
new major (backward incompatible) versions.  That way, if you use the latest
minor version, it should be backwards compatible with previous minor
versions and their shouldn't be an issue.  If there is a backwards
incompatibility, then the different namespaces allow you to manage that.

Cheers, Tony.

On 4 February 2010 18:49, cmoller <ch...@gmail.com> wrote:

>
> Does XML Beans have a solution planned for XSD versioning beyond custom
> class
> loaders? Specifically, is there any plan to support
> http://www.w3.org/2007/XMLSchema-versioning based versioning?
>
> I have control over the XSD that will be versioned, but I need to be able
> to
> accept files for older versions alongside new files. Are my only options a
> custom class loader, versioning in the namespace, or versioning in element
> names?
> --
> View this message in context:
> http://old.nabble.com/Support-for-versioning--tp27457786p27457786.html
> Sent from the Xml Beans - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@xmlbeans.apache.org
> For additional commands, e-mail: user-help@xmlbeans.apache.org
>
>