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Among genealogists, a primary source comes from a direct witness, a secondary source comes from second-hand information or hearsay told to others by witnesses, and tertiary sources can represent either a further link in the chain or an analysis, summary, or distillation of primary and/or secondary sources. In this system, an elderly woman's ...
Data collection or data gathering is the process of gathering and measuring information on targeted variables in an established system, which then enables one to answer relevant questions and evaluate outcomes.
All breaking news stories, without exception, are primary sources, and must be treated with caution: see Wikipedia:No original research § Primary, secondary and tertiary sources, Wikipedia:Identifying and using primary sources § Examples of news reports as primary sources.
Each operational source system may have its own method of identifying the same entities used in the logical data model, so record linkage between the different sources becomes necessary to ensure that the information about a particular entity in one source system can be seamlessly compared with information about the same entity from another ...
Better sources available: While a good tertiary source can usually be used without incident to source non-controversial facts, such citations can and should be superseded by ones to reliable secondary sources. WP:Identifying reliable sources tell us: "Each source must be carefully weighed to judge whether it is reliable for the statement being ...
[21] [22] The need for data cleaning will arise from problems in the way that the datum are entered and stored. [21] Data cleaning is the process of preventing and correcting these errors. Common tasks include record matching, identifying inaccuracy of data, overall quality of existing data, deduplication, and column segmentation. [23]
I see now .The source pages for the first and fifth quotations no longer exist, even in archived form, and the fourth quotation is taken out of context; the source also names "a newscaster's commentary on the day's events" and "Articles from magazines, journals, newsletters, newspapers, etc." as types of secondary sources. [1]
Statistics: data, particularly census data, and analysis. Theses and dissertations: works created as a requirement for the completion of an advanced postsecondary degree. This page describes some of the considerations in using these types of sources. Websites, blogs and other user-generated sources: online content from a variety of authors ...