/usr/share/stylebook/styles/christmas/dtd/ is in libstylebook-java 1.0~b3~svn20061109-6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/stylebook/styles/christmas/dtd/blocks.ent
/usr/share/stylebook/styles/christmas/dtd/blocks1.ent
/usr/share/stylebook/styles/christmas/dtd/book.dtd
/usr/share/stylebook/styles/christmas/dtd/changes.dtd
/usr/share/stylebook/styles/christmas/dtd/characters.ent
/usr/share/stylebook/styles/christmas/dtd/document.dtd
/usr/share/stylebook/styles/christmas/dtd/document1.dtd
/usr/share/stylebook/styles/christmas/dtd/faqs.dtd
/usr/share/stylebook/styles/christmas/dtd/links.ent
/usr/share/stylebook/styles/christmas/dtd/links1.ent
/usr/share/stylebook/styles/christmas/dtd/markup.ent
/usr/share/stylebook/styles/christmas/dtd/markup1.ent