+1 to ALLOW (but not require) the second use case of <configuration
xmlns=..>, this let you have autocomplete say in Eclipse's XML editor.
However I believe a xsi schemalocation would then still be needed per
plugin unless a catalogue is accessible out of bands, so it would still be
a bit verbose.

(I never understood why the default xsi schemalocation can't be the
namespace)
On 5 Jun 2016 8:38 a.m., "Roland Huss" <[email protected]> wrote:

> > Do you really think introducing XML namespaces would make the handling
> > of the pom better ? In particular if you have a separate namespace for
> > every plugin? (At apache maven project we have 49 plugins ? This would
> > mean in consequence 49 namespaces? And at mojohaus there are about
> > another 50 plugins? So this means having to use the configuration
> > parameters for all the plugins and on top you need to do namespace
> > configuration in your pom file? I'm the opinion this would make things
> > worse than better...(There are some things which are better)...
>
> I don't request to *require* the use of namespaces, but not to break if
> a namespace is used. It would be competely sufficient when Maven would
> ignore namespaces. The <configuration> element is specified having a
> <xs:any> content anyway.
>
> BTW, you don't have to specify the namespace on top, but can do at
> directly on the enclosing element itself.
>
> Here's my use case: I'm writing a Maven plugin which has an XSD for its
> configuration. This is useful for rich autocompletion and inline
> documentation tooltips in a decent IDE.
>
> There are two ways how you could use this xsd:
>
> * You can declare a namespace with prefix in the preamble of your
> pom.xml but then have to use the prefix for all your configuration
> options (which is quite a lot in my use case). You are not required to
> use a namespace, though (because of the <xs:any> type of a configuration)
>
> * Or, the better, more elegant way is to switch to the default namespace
> to your plugin int the <configuration> element :
>
> <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
>          xmlns="http://maven.apache.org/POM/4.0.0";
>          xsi:schemaLocation="....">
> ...
>     <plugin>
>        ....
>        <m:configuration
>             xmlns:m="http://maven.apache.org/POM/4.0.0";
>             xmlns="https://myplugin.org/v1";>
>
>           <myOption>bla</myOption>
>            ....
>        </m:configuration>
>     </plugin>
> ...
> </project>
>
> Both usage patterns are currently broken in Maven 3.3.9
>
> > In general pom changes in any way could only become part of pom model 5
> > (Maven 4/5 in line)  cause it would break to many things...You can take
> > a deep look into the jira for Maven 4..
> >
> https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12316922&version=12330198
>
> There is no change in the pom syntax required at all (i.e. the Schema is
> exactly the same as defined in http://maven.apache.org/POM/4.0.0), its
> only about the proper XML parsing of a pom model 4 with namespaces
> (which btw each decent XML parser is capable of).
>
> But even then, is the document
>
> https://cwiki.apache.org/confluence/display/MAVEN/Moving+forward+with+the+POM+data+model
> obsolete /wrt to XML namespaces ? Or what is the status of namespace
> support for the next major Maven version ? (sorry, couldn't find any
> information about this).
>
> cheers ...
> ... roland
>
> >
> >
> >
> > Kind regards
> > Karl Heinz Marbaise
> >
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> >
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