A driver’s license bureau maintains a database of licensed drivers. State whethe

Question

A driver’s license bureau maintains a database of licensed drivers. State whether each of the following represents data or metadata (if it represents data, state whether it is structured or unstructured data). If it represents metadata, state whether it is a fact describing a property of data or a fact describing the context of data.

a) Driver’s name, address, and birthdate.

b) The fact that the driver’s name is a 30-character field.

c) A photo image of the driver.

d) An image of the driver’s fingerprint.

e) The make and serial number of the scanning device that was used to scan the fingerprint.

f) The resolution (in megapixels) of the camera that was used to photograph the driver.

g) The fact that the driver’s birthdate must precede today’s date by at least 16 years.

Explanation / Answer

Definitions of the data and metadata.

Data – data are the objects stored in the database which can be easily stored and retrived from the database.

Metadata – metadata is nothing but the data about data. Mmetadata specifies the data types (char, int, date) we receive in the form of tuples of a database.

a) Driver’s name, address, and birthdate.: These are the necessary individual properties of database of driver's license. And therefore thses are classified as unstructured data, and can be stored and retrieved from the database.

b) The fact that the driver’s name is a 30-character field.: It is classified as metadata. It represents data type of driver's name. It is a metadata describing property of the data.

c) A photo image of the driver.: It is the necessary information of the data, therefore it is a unstructured data. Photo image is multimedia component and will not be stored and retrieved easily from he databse.

d) An image of the driver’s fingerprint.: Again , it s also unstructured data, which can not be stored and retrieved easily.

e) The make and serial number of the scanning device that was used to scan the fingerprint.: It is classified as structured data.

f) The resolution (in megapixels) of the camera that was used to photograph the driver.: It is also classified as structured data.

g) The fact that the driver’s birthdate must precede today’s date by at least 16 years.: It is a matadata and fact describing the context of data.

Thank you.

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