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http://jira.codehaus.org/browse/MWAR-218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=210106#action_210106
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Felipe Gaúcho commented on MWAR-218:
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Eclipse and other IDEs will complaint against an XML file without schema
declaration. That's the warning I refer in the issue. It is not actually a big
deal, but what people are doing out there is to disable the validation of this
file in the IDEs, a boring and unnecessary step if the plugin just include the
header in the generated file.
Other good reason to have the header is because it is an XML file and there is
no such thing like XML files without a model. If the plugin uses XML, we expect
it to use XML in the proper way.
I submitted the issue as "enhancement" because it is actually not a big deal,
but I believe it is very important to plugin to be the most correct as possible
- and I believe the effort to fix this issue is small enough to make it worthy
to be done.
> Missed XSD Schema for the file webapp-cache.xml
> -----------------------------------------------
>
> Key: MWAR-218
> URL: http://jira.codehaus.org/browse/MWAR-218
> Project: Maven 2.x WAR Plugin
> Issue Type: Improvement
> Affects Versions: 2.1-beta-1
> Reporter: Felipe Gaúcho
>
> When packaging a web-application, maven-war-plugin generates a cache file, as
> described here:
> http://maven.apache.org/plugins/maven-war-plugin/exploded-mojo.html#cacheFile
> This cache file is an XML file but the generated file doesn't contains an
> Schema or DTD declaration on its header. This makes impossible to validate
> such file, generating warnings in the most common Java IDEs. Since it is a
> mandatory XML file I believe it should has a model specification somewhere (a
> XSD Schema I hope), eventually just not released for public usage.
> The steps I expect to make Maven 2 WAR plugin better:
> - to modify the generator of the webapp-cache.xml file to include the proper
> XML header (with namespace and schema location)
> - to make the schema of such file publicly available, in order to give the
> developers and automatic tools a chance to validate any error in a deployable
> artifact.
> This will give us a chance to detect potential bugs before to deploy a
> web-application.
> ----------- The expected header is something like:
> <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
> <webapp-structure xmlns="http://maven.apache.org/plugins/maven-war-plugin";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://maven.apache.org/plugins/maven-war-plugin
> http://maven.apache.org/???/???.xsd";>
> ...
> </webapp-structure>
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