/usr/include/xqilla/exceptions/ is in libxqilla-dev 2.3.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/xqilla/exceptions/ASTException.hpp
/usr/include/xqilla/exceptions/ContextException.hpp
/usr/include/xqilla/exceptions/DynamicErrorException.hpp
/usr/include/xqilla/exceptions/FunctionException.hpp
/usr/include/xqilla/exceptions/IllegalArgumentException.hpp
/usr/include/xqilla/exceptions/ItemException.hpp
/usr/include/xqilla/exceptions/NamespaceLookupException.hpp
/usr/include/xqilla/exceptions/QueryInterruptedException.hpp
/usr/include/xqilla/exceptions/QueryTimeoutException.hpp
/usr/include/xqilla/exceptions/StaticErrorException.hpp
/usr/include/xqilla/exceptions/TypeErrorException.hpp
/usr/include/xqilla/exceptions/TypeNotFoundException.hpp
/usr/include/xqilla/exceptions/XMLParseException.hpp
/usr/include/xqilla/exceptions/XPath2ErrorException.hpp
/usr/include/xqilla/exceptions/XPath2TypeCastException.hpp
/usr/include/xqilla/exceptions/XPath2TypeMatchException.hpp
/usr/include/xqilla/exceptions/XQException.hpp
/usr/include/xqilla/exceptions/XQillaException.hpp