updating pom.xml elements using xslt - xslt

Question

I'm trying to update just finalName, artifactId and name in pom.xml using xslt. I don't understand xslt transformation, but I found this: how to modify xml file using xslt which seems very easy to follow, so based on that I created this template:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()|#*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="//artifactId">
<artifactId>aaaaaaaaaaaaaaaaaaaaaaaaaaa123</artifactId>
</xsl:template>
</xsl:stylesheet>
and building it using:
xsltproc template.xsl pom.xml > modified-pom.xml
however for some unknown to me reason, the xpath //artifactId does not seem to be matched and replaced. I tried also: artifactId only, project/artifactId, /project/artifactId etc. but none matches. Remembering lesson from using xmlstalet which requires specific namespaces, this seems to be maybe somehow namespace related, but I really don't know how to fix it, as man xsltproc seems to be somehow broken/not reflecting command reality. Can someone help where is the error?
EDIT: added partially solved state, based on request from comment:
as an minimally working example input file , we might consider this pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<artifactId>toUpdate</artifactId>
<name>toUpdate</name>
<properties>
<finalName>toUpdate</finalName>
</properties>
</project>
I'm using now template:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:m="http://maven.apache.org/POM/4.0.0">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()|#*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="/m:project/m:artifactId">
<artifactId>updated</artifactId>
</xsl:template>
<xsl:template match="/m:project/m:name">
<name>updated</name>
</xsl:template>
<xsl:template match="/m:project/m:properties/m:finalName">
<finalName>updated</finalName>
</xsl:template>
</xsl:stylesheet>
and replacing it using command: xsltproc template.xsl min.xml > out.xml
the output is:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<artifactId xmlns="" xmlns:m="http://maven.apache.org/POM/4.0.0">updated</artifactId>
<name xmlns="" xmlns:m="http://maven.apache.org/POM/4.0.0">updated</name>
<properties>
<finalName xmlns="" xmlns:m="http://maven.apache.org/POM/4.0.0">updated</finalName>
</properties>
</project>
where I'd like to get rid of part xmlns="" xmlns:m="http://maven.apache.org/POM/4.0.0"
if I update the replacement in template to: <m:finalName>updated</m:finalName> I'm not getting the correct result, but instead:
<m:finalName xmlns:m="http://maven.apache.org/POM/4.0.0">updated</m:finalName>
trying to declare global namespace instead of m also did not help me, as it even did not build.
Expected output is input with toUpdate replaced with updated

Answer 1

Consider the following minimized example:
XML
<project xmlns="http://maven.apache.org/POM/4.0.0">
<artifactId>toUpdate</artifactId>
<name>toUpdate</name>
<properties>
<finalName>toUpdate</finalName>
</properties>
</project>
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:m="http://maven.apache.org/POM/4.0.0"
exclude-result-prefixes="m">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<!-- identity transform -->
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="m:artifactId">
<artifactId>updated</artifactId>
</xsl:template>
</xsl:stylesheet>
Result
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0">
<artifactId>updated</artifactId>
<name>toUpdate</name>
<properties>
<finalName>toUpdate</finalName>
</properties>
</project>
Note the two namespace declarations in the xsl:styleshhet start-tag. One is for addressing the elements in the source XML. The other puts any literal result elements in the stylesheet in the target namespace.
If you only to want to replace the text content of an element, without renaming it, you could simplify this to:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:m="http://maven.apache.org/POM/4.0.0"
exclude-result-prefixes="m">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<!-- identity transform -->
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="m:artifactId/text()">updated</xsl:template>
</xsl:stylesheet>