<P> Most commonly, the term constitution refers to a set of rules and principles that define the nature and extent of government . Most constitutions seek to regulate the relationship between institutions of the state, in a basic sense the relationship between the executive, legislature and the judiciary, but also the relationship of institutions within those branches . For example, executive branches can be divided into a head of government, government departments / ministries, executive agencies and a civil service / administration . Most constitutions also attempt to define the relationship between individuals and the state, and to establish the broad rights of individual citizens . It is thus the most basic law of a territory from which all the other laws and rules are hierarchically derived; in some territories it is in fact called "Basic Law". </P> <P> The following are features of democratic constitutions that have been identified by political scientists to exist, in one form or another, in virtually all national constitutions . </P> <Table> <Tr> <Th> Type </Th> <Th> Form </Th> <Th> Example </Th> </Tr> <Tr> <Td> Codified </Td> <Td> in single act (document) </Td> <Td> Most of the world constitutions . </Td> </Tr> <Tr> <Td> Uncodified </Td> <Td> fully written (in few documents) </Td> <Td> San Marino, Israel, Saudi Arabia </Td> </Tr> <Tr> <Td> Uncodified </Td> <Td> partially unwritten (see constitutional convention) </Td> <Td> Canada, NZ, UK </Td> </Tr> </Table> <Tr> <Th> Type </Th> <Th> Form </Th> <Th> Example </Th> </Tr>

How many types of constitution exist in the world
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