This issue still applies to 6.1.
Although there are r.reclass.rules(file) and r.recode.rules(file), thanks to
Michael, these are only a workaround.
However, this seems to be a complicated issue - see the recent discussion on
interactive GUI in case of r.in.gdal:
http://article.gmane.org/gmane.comp.gis.grass.user/9076
Maciek
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