Hexadecimal number system and Positional representation system

Hexadecimal number system noun - A positional system of numeration that uses hexadecimal digits and a radix of sixteen.

Positional representation system and hexadecimal number system are semantically related. In some cases you can use "Positional representation system" instead a noun phrase "Hexadecimal number system".

Positional representation system noun - A numeration system in which a real number is represented by an ordered set of characters where the value of a character depends on its position.

Hexadecimal number system and positional representation system are semantically related. Sometimes you can replace phrase "Hexadecimal number system" with "Positional representation system", this phrases are similar.