Hi, as suggested by Herve Boutemy [1], I'm creating a new discussion on the namespace topic because I couldn't find the previous one(s).
I understand the percentage of Maven users who parse/generate pom files with non-Maven XML tooling is probably very low. But you need to realize that Maven pom files are a tiny speck in the XML ecosystem. If some people don't know the differences between an XML namespace and an XML schema, they should read the relevant W3C specifications instead of reinventing the wheel and changing the way XML is supposed to work. Here are a few pointers. 1. An XML namespace is identified by its URI: https://www.w3.org/TR/xml-names/#concepts By changing the URI, you create an entirely new namespace. 2. The root element of an XML schema has a targetNamespace attribute: https://www.w3.org/TR/xmlschema-1/#declare-schema Multiple schemas can use the same targetNamespace value. 3. The schemaLocation attribute from the XMLSchema-instance namespace provides a way to associate a namespace URI with a schema: https://www.w3.org/TR/xmlschema-1/#xsi_schemaLocation Can't you infer the modelVersion from that? xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"; vs xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.1.0.xsd"; Let's use XSLT as an example. XSLT 1.0 was published on 1999/11/16 and defined its namespace URI as: http://www.w3.org/1999/XSL/Transform https://www.w3.org/TR/xslt-10/#xslt-namespace XSLT 2.0 was first published on 2007/01/23 and uses the same namespace URI: https://www.w3.org/TR/xslt20/#xslt-namespace NB: the updated 2021/03/30 version didn't modify it. XSLT 3.0 was published on 2017/06/08 and uses the same namespace URI: https://www.w3.org/TR/xslt-30/#xslt-namespace XSLT 4.0 also uses the same namespace URI in its 2026/03/31 working draft: https://qt4cg.org/specifications/xslt-40/Overview.html#xslt-namespace The XSLT model has changed significantly over the years yet the namespace URI has remained constant. Did you ever wonder why? Aside from the modelVersion inference that was mentioned at the start of the vote thread [2], are there more reasons that "justify" the namespace change? I asked some AI tool to compare maven-4.0.0.xsd with maven-4.1.0-rc-4.xsd. The changes seem rather limited but AI tools are notoriously unreliable, so... Regards, Chris [1] https://lists.apache.org/thread/trxmjc63fp2of83zyvzhp9jt59vh56c1 [2] https://lists.apache.org/thread/p59nlz2onjkszskxblo5vrcb7chjmnwl --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
