/usr/share/doc/libnanoxml2-java/api/net/ is in libnanoxml2-java-doc 2.2.3.dfsg-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libnanoxml2-java/api/net/n3/
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/IXMLBuilder.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/IXMLElement.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/IXMLEntityResolver.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/IXMLParser.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/IXMLReader.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/IXMLValidator.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/NonValidator.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/StdXMLBuilder.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/StdXMLParser.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/StdXMLReader.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/ValidatorPlugin.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/XMLElement.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/XMLEntityResolver.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/XMLException.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/XMLParseException.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/XMLParserFactory.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/XMLValidationException.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/XMLWriter.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/package-frame.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/package-summary.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/package-tree.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/sax/
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/sax/SAXAdapter.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/sax/SAXEntityResolver.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/sax/SAXParser.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/sax/package-frame.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/sax/package-summary.html
/usr/share/doc/libnanoxml2-java/api/net/n3/nanoxml/sax/package-tree.html