/usr/share/xml/ is in sgml-data 2.0.6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xml/declaration/
/usr/share/xml/declaration/big5xml.decl
/usr/share/xml/declaration/xml.dcl
/usr/share/xml/declaration/xml.decl
/usr/share/xml/declaration/xml.soc
/usr/share/xml/declaration/xml1n.dcl
/usr/share/xml/entities/
/usr/share/xml/entities/xml-iso-entities-8879.1986/
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsa.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsb.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsc.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsn.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamso.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsr.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISObox.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOcyr1.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOcyr2.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOdia.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOgrk1.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOgrk2.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOgrk3.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOgrk4.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOlat1.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOlat2.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOnum.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOpub.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOtech.ent
/usr/share/xml/entities/xml-iso-entities-8879.1986/catalog
/usr/share/xml/entities/xml-iso-entities-8879.1986/catalog.xml
/usr/share/xml/qaml/
/usr/share/xml/qaml/catalog
/usr/share/xml/qaml/catalog.xml
/usr/share/xml/qaml/qaml-xml.dtd
/usr/share/xml/svg/
/usr/share/xml/svg/catalog
/usr/share/xml/svg/catalog.xml
/usr/share/xml/svg/svg10.dtd
/usr/share/xml/svg/svg11.dtd