X-Resource is an extension that allows a client to query the X server about its usage of various resources.
acquired package info from repodata DB: repodata/f1f85c23079e7764ad00378a9fc5d660b89a03657290e75426caf7be5b7da462-primary.sqlite.bz2
The libX11-devel package contains libraries and header files for libX11.
The libXres-devel package contains libraries and header files for libXres.
development files and header files for libXext
The libXext-devel package contains libraries and header files for developing applications that use libXext.