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Wikipedia is not a directory. It is an encyclopaedia. It is notability that stops Wikipedia from becoming a directory instead of an encyclopaedia.
The primary criterion for notability is whether the subject of an article has been the subject of non-trivial published works by multiple separate sources that are independent of that subject, which applies to all classes of subjects.
For certain classes of subjects, we augment that primary criterion with secondary inclusion criteria that ensure that our coverage of certain topics is coherent.
It is a widely accepted principle that Wikipedia is not a directory. Wikipedia is not a directory of businesses, like the Yellow Pages. That's Yellowikis' job. Wikipedia is not a genealogical directory. That's Wikitree's job. Wikipedia is not a directory of World Wide Web sites. That's Wikidweb's and AboutUs's job. Wikipedia is an encyclopaedia.
Unfortunately, if the criteria for inclusion in Wikipedia were solely the strict application of our Neutral point of view, Verifiability, and No original research policies, a directory (rather than an encyclopaedia) is what would result. This is for the simple reason that directories exist that can be used as reliable sources.
The primary criterion for notability, that applies in all fields, is that an article's subject is notable if it has been the subject of non-trivial published works by multiple separate sources that are independent of that subject itself.
There are several important considerations behind this criterion:
The rationale that underpins the primary notability criterion is that the fact that something has been noted demonstrates that it is notable. Notability is something that is judged by the world at large, not by Wikipedia editors making personal judgements. If multiple people in the world at large that are independent of the subject have gone to the effort of creating and publishing non-trivial works of their own about the subject, then they clearly consider it to be notable. Wikipedia simply reflects this judgement.
For certain classes of subjects, the primary criterion is augmented by secondary inclusion criteria. The intention of these criteria is to ensure that our coverage of certain subjects is coherent, even when the primary notability criterion would fail.
We want our coverage of stock market indexes to be coherent. Therefore our notability and inclusion criteria for businesses comprise secondary criteria that ensure that every company that is used by a stock market index (that isn't simply taken from the whole market) is included, even if there are no independent published works about that company and the only information about it is business directory listings and corporate autobiography.
We want to include an article on a band, musical group, or musician that has had a top 10 hit, even if there are no independent published works about that band/group/person and the only information about them is the chart listings and autobiography. (Articles on bands/groups/musicians comprise both biography and discography sections. Even if the former cannot be populated from sources, the latter can.) Therefore our music notability and inclusion criteria comprise secondary criteria that ensure that bands/groups/musicians who have had hits are included.
We want to include an article on an author that has published widely read books or articles, even if there are no independent published works about that person and the only information about them is the list of what they have published. (Articles on authors comprise both biography and bibliography sections. Even if the former cannot be populated from sources, the latter can.) Therefore our people notability and inclusion criteria comprise secondary criteria that ensure that authors who have published widely read books/articles are included.
You can write about subjects that are close to you, but you must be very careful indeed. The primary requirement is this:
So, for example, if you are writing about yourself or about a family member, then use independent biographies as sources, not your own autobiography. If there aren't any independent biographies, don't write about yourself or your family member. Similarly, if you are writing about your company, then use independent articles written about your company as sources, not your company's autobiography and press releases. If there are no such sources, don't write about your company.
This approach has two benefits:
When giving rationales for keeping or deleting articles based upon notability, please learn the lesson of Wikipedia:Requests for comment/ComCat. A bare "nn, delete" or "n, keep" are not good rationales. In fact, they aren't really rationales at all, and of no use to a closing administrator in making a decision. A good rationale:
There are several things that are commonly conflated with notability, or that editors erroneously accuse notability of being.
Notability is not the same as the concepts of fame or importance. A subject that is not famous or that is not important is not automatically non-notable; and conversely a subject that is notable is not automatically famous nor important. The concepts of fame and importance have implicit in them the notion of a target population — a subject is famous amongst a group of people, a subject is important to a particular set of people. Notability has no such implicit notion. Notability is independent of specific groups of people.
To understand this, consider that the primary notability criterion makes no mention of readership. A subject is not notable under the primary criterion if it is widely read about. It is notable by dint of people writing about it. It is the source writers, not the target readership population, that is relevant to the primary notability criterion.
Whilst someone may become famous because lots of people read an article about them in a mass-market tabloid newspaper, what makes that person notable, or rather what demonstrates that that person is notable, is the fact that the journalist, editor, and publisher at the newspaper went to the effort of researching, writing, and publishing an independently sourced non-trivial article about that person.
Notability does not equate to "I've heard of it."/"I've never heard of it." or "I think that it is notable."/"I don't regard it as being notable.". An editor who judges an article based upon those subjective criteria is not employing a notability criterion.
Notability is not judged by Wikipedia editors directly. As is the case in other aspects, when it comes to notability Wikipedia is a reflection of what exists in the world. The notability of a subject is not judged by Wikipedia editors themselves. It is judged by the world at large. A subject is notable if the world at large considers it to be notable.
Wikipedia editors determine whether the world has judged a subject to be notable by applying the primary notability criterion. If someone independent of the subject has gone to the effort of creating and publishing a non-trivial published work about it, then that someone clearly deems the subject to be notable. Wikipedia editors determine whether a subject is notable not by considering whether they themselves think that it is notable. They determine whether a subject is notable by looking for the existence of non-trivial, independently sourced, published works on the subject.
Notability does not equate to verifiability from reliable sources. As discussed earlier, many directories are reliable sources and have been fact checked. Verifiability from reliable sources yields a directory. The purpose of notability is to ensure that Wikipedia does not become a directory, and leaves the creation of directories of businesses, all people who have ever lived, web sites, and suchlike to those projects that have those as their goals.
Some editors artificially restrict what constitutes a "reliable source" in order to yield the same results as the primary notability criterion. However, this does not work, because in order to achieve the desired results it is not only necessary to eliminate unreliable sources, but it is also necessary to eliminate sources that are not only reliable, but are authoritative. That is clearly wrong.
An example should make this clear: The plot of grassland to the west of Uncle G's house is verifiable. It is recorded in publicly accessible, government maintained, records. Those records include regulations that apply to the land, a history of its ownership, detailed maps, and photographs. Not only are these records reliable sources, they are authoritative. There is no scope for an encyclopaedia article on this plot of grassland. It is just an area where grass grows. It is not Mill Ends Park. But verifiability from reliable sources cannot exclude this plot of grassland without excluding authoritative sources along the way. However, the primary notability criterion does. No-one has created or published a non-trivial published work, e.g. a detailed history or analysis, about the plot of grassland to the west of Uncle G's house. But they have about Mill Ends Park. Therefore the latter is notable and the former is not.
It is tempting to infer "All X are notable." from observations that many "X" have been found to satisfy the primary notability criterion, and thence proclaim that a precedent has been set. Precedent is an "If article X then article Y." argument, which is fundamentally flawed. Every subject must be considered on its individual merits. Inferences that "All X are notable.", and indeed that "All X are non-notable.", are invariably wrong. Shortcuts like this may be tempting, but must be avoided.
One example: It was long proclaimed by some editors that "All real places are notable." as an inference derived, in part, from the discussion that came about when Rambot began creating articles on United States cities. But that isn't actually correct. The plot of grassland to the west of Uncle G's house is a real place, but it isn't notable. Danmark (island) (AfD discussion) and Hoy (Lake Constance) (AfD discussion) are real places, but there's nothing written — no histories, geographies, geological reports, demographic studies, and so forth — about them. The primary notability criterion isn't satisfied.
The reason that a lot of real places turn out to be notable is not that "All real places are notable.". It is that because of their natures cities, towns, and villages are discussed in multiple non-trivial published works such as history books; demographic, economic, and sociological studies; census reports; and so forth. It is wrong to say that "All real places are notable.", and then to employ that as a blanket criterion in future. It is correct to say that because of their very natures almost all cities, towns, and even villages in the world will satisfy the primary notability criterion.
Notability deals in subjects and topics, not content.3 That a subject is non-notable does not mean that verifiable information about a subject should be excluded from Wikipedia. It means that the subject is not an appropriate one for an article.
There are, in the main, two ways in which subjects can fail to satisfy the primary notability criterion whilst still being mentioned in published works:
In the first case, Wikipedia should not have an article. For example: If the only sources of information about a person are xyr autobiographies, then Wikipedia should not have an article on that person.4
In the second case, the fact that the subject is non-notable means that having an entire article is the wrong way for Wikipedia to be presenting what information there is on the subject. That doesn't necessarily mean deletion, however. One way of presenting the information correctly is merger into an article with a wider scope, the same scope as the published works outside of Wikipedia, for example.
Some examples should make this clear:
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(help), and "President Bill Clinton's Hometown Homepage". Hot Springs Promenade..{{cite news}}
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