The following information was provided by the package's contributor.
Name of contribution: impnattypo
Author's name: Rapha«l Pinson
Package version: v0.5
Location on CTAN: macros/latex/contrib/impnattypo/
Summary description: Recommendations typographiques de l'Imprimerie
Nationale Fran§aise
License type: lppl
Announcement text given by the package's contributor:
Version 0.5 adds automatic detection of homeoarchies for LuaTeX
thanks for the upload; i've installed the new version, and updated the
catalogue repository.
Users may view the package catalogue entry at
http://www.tex.ac.uk/tex-archive/help/Catalogue/entries/impnattypo.html
or they may browse the package directory at
http://www.tex.ac.uk/tex-archive/macros/latex/contrib/impnattypo/
The catalogue entry will change (somewhat) overnight tonight.