A unique number is given to each land parcel to provide a unique identification in space and time.

Biometrics is also included in this repository to ensure unique identification.

Thus each square has a unique identification of file letter followed by rank number.

However, unique identification of things may be achieved through other means such as barcodes or 2D-codes as well.

An individual may also lie about his or her date of birth or social security number as well, making an independent, unique identification key necessary.

As a result, metadata that ensure unique identification is often missing.

This allows for unique identification in the event that 2 trains on the same route are operating simultaneously.

The header data include information such as name, unique identification and the allocation to the right machines.

Each transponder is directly registered to a specific truck, and contains a unique identification.

Usually each nurse is issued a unique identification or license number.