Version parsimony models:
| • | Character states | |||
| – | Binary: states are 0 and 1 usually interpreted as presence or absence of an attribute (eg. character is a gene and can be present or absent in a genome) | |||
| – | Multistate: Any number of states (Eg. Characters are position in a multiple sequence alignment and states are A,C,T,G. | |||
| • | Type of changes: | |||
| – | Characters are ordered (the changes have to happen in particular order or not. | |||
| – | The changes are reversible or not. | |||
