Understanding DATA Goals: understand the difference between data and text by thinking about computability learn some basic data types.

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Presentation transcript:

Understanding DATA Goals: understand the difference between data and text by thinking about computability learn some basic data types

Why data?

“currency” Validation

Computation

Data exchange March 23, Tolkien, J. R. R. (John Ronald Reuel),

Common data types text - "text" defined data types: date (& time) currency numbers (integers,...) controlled lists: finite values to use languages (ISO...) countries (ISO...)

Text, or data? January 7, cm. high $29.99 Format: yyyy-mm--dd h – w – d | unit h= 23 |unit=cm | currency | USD

Exercise 2: Data Take each of the data elements that you created in the first exercise and define the element as data using one of the data types presented in the lecture. text numeric currency identifier controlled value