i need to remove prefixes using xslt-3and exclude-result-prefixes - xslt-3.0

Question

input xml
<?xml version="1.0" encoding="UTF-8" ?>
<mr:collection
xmlns:mr="http://www.lc.gov/mr2/slim"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.lc.gov/mr2/slim http://www.lc.gov/standards/mrxml/schema/mr21slim.xsd">
<mr:rc>
<mr:dtf tg="2000" i1="1" i2=" ">
<mr:sbf cd="a">Christoph Kolumbus</mr:sbf>
<mr:sbf cd="d">John Diter</mr:sbf>
<mr:sbf cd="b">Julie Nat</mr:sbf>
<mr:sbf cd="f">Darius Milhaud</mr:sbf>
<mr:sbf cd="g">Erich kleiber</mr:sbf>
<mr:sbf cd="g">Franz Ludwig Horth</mr:sbf>
</mr:dtf>
<mr:dtf tg="3000" i1="1" i2=" ">
<mr:sbf cd="a">Christoph Kolumbus</mr:sbf>
<mr:sbf cd="d">Serg</mr:sbf>
<mr:sbf cd="b">Mak</mr:sbf>
<mr:sbf cd="f">DarMil</mr:sbf>
<mr:sbf cd="g">Erikl</mr:sbf>
<mr:sbf cd="g">LudHorth</mr:sbf>
</mr:dtf>
</mr:rc>
<mr:rc>
<mr:dtf tg="2000" i1="1" i2="0">
<mr:sbf cd="a">Chris Prante</mr:sbf>
<mr:sbf cd="e">"Chris Dietz"</mr:sbf>
</mr:dtf>
</mr:rc>
</mr:collection>
with the following xsl
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xpath-default-namespace="http://www.lc.gov/mr2/slim"
xmlns:e="https://example.com"
xmlns:dc="https://examples.com"
exclude-result-prefixes="#all"
expand-text="yes"
version="3.0">
<xsl:mode on-no-match="shallow-copy"/>
<xsl:output method="xml" indent="yes"/>
<xsl:template match="collection">
<O-PM>
<ListRcs>
<xsl:apply-templates/>
</ListRcs>
</O-PM>
</xsl:template>
<xsl:template match="rc">
<e:rc>
<xsl:apply-templates/>
</e:rc>
</xsl:template>
<xsl:template match="dtf[#tg = 2000]">
<mdtd>
<rc>
<dc:title xml:lang="el">{sbf[#cd = 'a']} {sbf[#cd = 'b']}{sbf[#cd = 'e']!(':', .)} {sbf[#cd = 'f']!('/', .)}{(sbf[#cd = 'g'] => string-join(' ; '))!('', .)}</dc:title>
</rc>
</mdtd>
</xsl:template>
<xsl:template match="dtf[#tg != 2000]"/>
</xsl:stylesheet>
we get
<?xml version="1.0" encoding="UTF-8"?>
<O-PM>
<ListRcs>
<e:rc xmlns:e="https://example.com">
<mdtd>
<rc>
<dc:title xmlns:dc="https://examples.com" xml:lang="el">Christoph Kolumbus Julie Nat / Darius Milhaud Erich kleiber ; Franz Ludwig Horth</dc:title>
</rc>
</mdtd>
</e:rc>
<e:rc xmlns:e="https://example.com">
<mdtd>
<rc>
<dc:title xmlns:dc="https://examples.com" xml:lang="el">Chris Prante : "Chris Dietz" </dc:title>
</rc>
</mdtd>
</e:rc>
</ListRcs>
</O-PM>
how can one get <e:rc> instead of <e:rc xmlns:e="https://example.com">?
exclude-result-prefixes should work for literal result elements we create in our XSLT code... I need to declare namespaces and i am not getting the output i want.
ie <e:rc> instead of <e:rc xmlns:e="https://example.com">
and <dc:title xml:lang="el"> instead of <dc:title xmlns:dc="https://examples.com" xml:lang="el">

Answer 1

If you use
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xpath-default-namespace="http://www.lc.gov/mr2/slim"
xmlns:e="https://example.com"
xmlns:dc="https://examples.com"
exclude-result-prefixes="xs"
expand-text="yes"
version="3.0">
i.e. don't exclude the prefixes e and dc you declared for serialization you will get a root element declaring them e.g.
<O-PM xmlns:dc="https://examples.com" xmlns:e="https://example.com">
and content like
<e:rc>
<mdtd>
<rc>
<dc:title xml:lang="el">Christoph Kolumbus Julie Nat / Darius Milhaud Erich kleiber ; Franz Ludwig Horth</dc:title>
</rc>
</mdtd>
</e:rc>