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Data vs Contravariance - What's the difference?

data | contravariance |

As nouns the difference between data and contravariance

is that data is (time) date while contravariance is (label) the reversal of the order of data types acted upon by an operator.

data

English

Alternative forms

* (electronics)

Noun

(wikipedia data) (-) or plural noun
  • English plurals: Pieces of information.
  • (uncountable, collectively) Information, especially in a scientific or computational context.
  • *
    • With fresh material, taxonomic conclusions are leavened by recognition that the material examined reflects the site it occupied; a herbarium packet gives one only a small fraction of the data desirable for sound conclusions. Herbarium material does not, indeed, allow one to extrapolate safely: what you see is what you get
  • * {{quote-magazine, date=2013-06-22, volume=407, issue=8841, page=76, magazine=(The Economist)
    • , title= Snakes and ladders , passage=Risk is everywhere.
  • (computing) A representation of facts or ideas in a formalized manner capable of being communicated or manipulated by some process.

    • Usage notes

    * This word is more often used as an uncountable noun with a singular verb than as a plural noun with singular datum. * The definition of data'' in the computing context is from an international standard vocabulary] and is meant to distinguish ''data'' from ''information . However, this distinction is largely ignored by the computing profession.[http://eprints.utas.edu.au/1957/1/Cm1My.pdf

    Derived terms

    * big data * databank * database * datasheet * data acquisition * data analysis * data domain * data element * data entry * data farming * data hiding * data integrity * data maintenance * data management * data mining * data modeling * data path, datapath * data processing * data recovery * data set * data sink * data source * data warehouse * metadata * primary data * raw data

    References

    * (The American Heritage Dictionary's usage note on 'data') * Calpundit: YOU SAY DAY-TA, I SAY DAA-TA * John Quiggin: Data is not the plural of datum * johnaugust.com: ‘Data’ is singular

    Anagrams

    * English disputed terms English words affected by prescriptivism ----

    contravariance

    English

    Noun

  • (label) The reversal of the order of data types acted upon by an operator
  • (label) A functor which reverses composition

    • See also

    * covariance

    Related terms

    * contravariant ----