unikernel/duniverse/dune_/doc/explanation/tour/libraries.rst

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+Libraries
+=========
+
+Dune, as a package, is primarily an executable, but its source tree embeds a
+few public libraries. These are developed in :file:`otherlibs/`.
+
+Some of these have a special link to Dune, such as ``dune-build-info`` or
+``dune-site``. Others are just helper libraries that we develop as part of
+Dune, but they have a strong relation to the Dune internals, like ``dyn`` or
+``xdg``.
+
+.. seealso:: :doc:`/dune-libs`