When people say things like this:

my family are ..

0.1.0 pygmy rattle snake
1.0.0 Hetero Japanese rat snake
0.0.1 Rhinocerous Viper
1.0.0 Mex Black king snake
0.1.0 Children`s python
1.2.0 Dwarf lancehead Viper
1.0.0 Whitelipped python

What do the numbers mean?