/usr/share/stylebook/styles/ibm-style/stylesheets/ is in libstylebook-java 1.0~b3~svn20061109-6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/stylebook/styles/ibm-style/stylesheets/any2header.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/any2project.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/book2group.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/book2project.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/changes2document.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/context2footer.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/context2label.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/directory2project.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/document2html.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/faqs2document.xsl
/usr/share/stylebook/styles/ibm-style/stylesheets/group2document.xsl