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  2. Data sources - Wikipedia

    en.wikipedia.org/wiki/Data

    One example of this usage is the term "big data". When used more specifically to refer to the processing and analysis of sets of data, the term retains its plural form. This usage is common in the natural sciences, life sciences, social sciences, software development and computer science, and grew in popularity in the 20th and 21st centuries.

  3. Secondary data - Wikipedia

    en.wikipedia.org/wiki/Secondary_data

    The data may have been used in published texts and statistics elsewhere, and the data could already be promoted in the media or bring in useful personal contacts. Secondary data generally have a pre-established degree of validity and reliability which need not be re-examined by the researcher who is re-using such data. Secondary data is key in ...

  4. Information retrieval - Wikipedia

    en.wikipedia.org/wiki/Information_retrieval

    Models with transcendent term interdependencies allow a representation of interdependencies between terms, but they do not allege how the interdependency between two terms is defined. They rely on an external source for the degree of interdependency between two terms. (For example, a human or sophisticated algorithms.)

  5. Wikipedia:Advanced source searching - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Advanced_source...

    Customizing searches using your preferred search engine (for instance Google or DuckDuckGo) by simply adding "news" or "news," (both without quotation marks) and then the search term in quotation marks offers results different from the dedicated "news" tab. Quality, quantity and recency vary. It's often necessary to view several pages after the ...

  6. Search engine (computing) - Wikipedia

    en.wikipedia.org/wiki/Search_engine_(computing)

    Sometimes, data searched contains both database content and web pages or documents. Search engine technology has developed to respond to both sets of requirements. Most mixed search engines are large Web search engines, like Google. They search both through structured and unstructured data sources. Take for example, the word ‘ball.’

  7. Wikipedia:Identifying and using primary sources - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Identifying_and...

    Wikipedia does not use these terms exactly like academics use them. There are at least two ways in which the term secondary source is used on Wikipedia. This page deals primarily with the classification of reliable sources in terms of article content. The classification used specifically for notability is addressed in a separate section at the end.

  8. Wikipedia : Primary Secondary and Tertiary Sources

    en.wikipedia.org/wiki/Wikipedia:Primary...

    An eyewitness account of a traffic accident is an example of a primary source. Other examples include archeological artifacts; photographs; videos; historical documents such as diaries, census results, maps, or transcripts of surveillance, public hearings, trials, or interviews; untabulated results of surveys or questionnaires; the original ...

  9. Query language - Wikipedia

    en.wikipedia.org/wiki/Query_language

    SQL is a well known query language and data manipulation language for relational databases; XQuery is a query language for XML data sources; XPath is a declarative language for navigating XML documents; YQL is an SQL-like query language created by Yahoo! Search engine query languages, e.g., as used by Google [5] or Bing [6]