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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 ...
A secondary source contrasts with a primary, or original, source of the information being discussed. A primary source can be a person with direct knowledge of a situation or it may be a document created by such a person. A secondary source is one that gives information about a primary source.
External links and references are two important elements of Wikipedia that newcomers sometimes find trouble with. This page is designed to cover only the technical aspects of linking and referencing; it is essential that editors also familiarize themselves with Wikipedia:External links, Wikipedia:Reliable sources and Wikipedia:Citing sources, as well as Wikipedia's various other policies ...
Availability of secondary sources covering the subject is a good test for notability. " Sources " [ 3 ] should be secondary sources , as those provide the most objective evidence of notability. There is no fixed number of sources required since sources vary in quality and depth of coverage, but multiple sources are generally expected. [ 4 ]
Similarly for breaking news, a contemporary secondary news source can quickly become a historical primary source. Articles of recent current events must be periodically updated with new secondary sources. Sources of any age may be prone to recentism, and this needs to be balanced out by careful editing.
Whether a source is primary, secondary or tertiary can depend on the topic that an article is covering. For example, the summary for policy makers from the IPCC is a secondary source for the article Global warming but it would be a primary source if used for the article Intergovernmental Panel on Climate Change. Similarly, a book review in a ...
Sources must support the material clearly and directly: drawing inferences from multiple sources to advance a novel position is prohibited by the NOR policy. [h] Base articles largely on reliable secondary sources. While primary sources are appropriate in some cases, relying on them can be problematic.
Link rot is a major problem for the English Wikipedia, more so than for other websites, since most external links are used to reference sources. Some of the dead links are caused by content being moved around without proper redirection, while others require micropayments after a certain time period, and others simply vanish.