Wikipedia:Naming conventions (technical restrictions) and Discount marketing: Difference between pages
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#redirect [[Discount store]] |
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{{Wikipedia subcat guideline|naming conventions|technical restrictions}} |
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{{main|Wikipedia:Naming conventions}} |
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Some article titles cannot be named correctly due to limitations in the MediaWiki software, Eg. the first character is forced to be upper case. Currently known limitations are listed below in this article, though there may be others. |
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Where you want to draw readers' attention to this kind of situation (except for a [[#lower case first letter|lower case first letter]] as explained below), insert something like this before the opening paragraph of the article: |
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'''<nowiki>{{</nowiki>[[Template:Wrongtitle|wrongtitle]]|title=''Correct Title''<nowiki>}}</nowiki>''' |
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Which will produce the text: |
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:{{wrongtitle|title=Correct Title}} |
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For a list of articles that are affected by these problems, see [[Special:Whatlinkshere/Template:Wrongtitle]]. |
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==Excluded characters== |
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===Characters not allowed at all in page titles=== |
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The following characters are not allowed in page titles: |
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# < > [ ] | { } |
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and the [[ASCII]] character codes 0-31 and 127. |
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Attempting to use disallowed characters will result in a "bad title" error. |
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===Forward slash=== |
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The forward slash (/) is used to separate subpages from their main pages. While [[wikipedia:subpages|subpages]] are now disabled in the main namespace there are still a couple of side effects of the system to support them that affect articles. |
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* If a / is the first character of the title then normal links to it will not work as expected (they will prepend the title of the current page); a workaround is to prepend a colon, or to use a html entity as the beginning of the link, e.g. <nowiki>[[:/dev/null]]</nowiki>, <nowiki>[[&#47;dev/null]]</nowiki> or <nowiki>[[&#x2f;dev/null]]</nowiki> to get to [[:/dev/null]]. |
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* Subpages are still enabled in the talk namespace as they are widely used for archiving old discussion. Therefore if an article has a forward slash in its name its corresponding talk page will have a subpage level-up link at the top (for example [[Talk:R/2004 S 1]] has a link to [[Talk:R]] at the top). |
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See [[Wikipedia:Articles with slashes in title]] for a list of such articles. |
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===Question mark=== |
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Special attention should also be paid to the use of the question mark (?). |
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A page like [[Switch? (The Price is Right pricing game)]] can be created as usual by following the link. However, when typed into the address bar of a browser, everything following the question mark will be cut off. For example, typing in |
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http://en.wikipedia.org/wiki/Switch?_(The_Price_is_Right_pricing_game) |
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will cause you to be directed to [[switch]]. Instead, use |
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http://en.wikipedia.org/wiki/Switch%3F_(The_Price_is_Right_pricing_game) |
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This is a consequence of web server software treating everything after a ? as a [[query string]]. Whilst it would be possible to glue the url back together this would cause issues with urls like http://en.wikipedia.org/wiki/Switch?action=edit which is equivalent to http://en.wikipedia.org/w/index.php?title=Switch&action=edit |
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===Plus=== |
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The symbol + can sometimes cause problems when used in URLs. In URLs using the "/wiki/Article_name" notation the plus sign has no special meaning, but in the "/w/index.php?title=Article_name" notation (and in the parts of an URL after the question mark in general) the plus sign is replaced with a space. To get an actual plus sign, it must be encoded as "%2B". |
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For example, http://en.wikipedia.org/wiki/C++ will lead to the article on the [[C++]] programming language, but http://en.wikipedia.org/w/index.php?title=C++ will lead to [[C]] instead (as the trailing spaces are stripped). To avoid this, use http://en.wikipedia.org/w/index.php?title=C%2B%2B instead. |
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===Spaces and underscores=== |
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In links spaces and underscores (_) are treated equivalently. The underscore is used in the url while the space is used in displayed titles. This was done to make the urls for page titles containing spaces more readable. Leading and trailing spaces and/or underscores are stripped, multiple spaces and/or underscores are squashed together to a single underscore and page names consisting of only spaces and/or underscores are not allowed at all. However, an article name cannot contain an underscore as the underscore would be converted to a space. |
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===Dot=== |
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Pages named . or .. and page names starting with ./ or ../ are not allowed at all. |
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Pages with dots and slashes combined in certain other ways, e.g. [http://en.wikipedia.org/w/wiki.phtml?title=/.&redirect=no /.] (which is a redirect to [[slashdot]]), are allowed by MediaWiki, but there are major problems with links to them (probably caused by path parsing code in browsers, but see also [[#Forward_slash]] above). |
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===Percent=== |
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MediaWiki supports [[percent-encoding]] in wiki links, in which a percent followed by two [[hexadecimal]] digits is converted to a single character. Thus, [[%25|%25]] is the same as [[%]]. Article titles containing a percent-encoded sequence are not allowed. For example, [[%2542]] should link to "%42", but doesn't link anywhere. A possible workaround would be to use non-ascii characters that look the same as the ones required; however this may create issues with older browsers. |
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If the two characters following the percent do not form a valid pair of hexadecimal digits, it works as expected. |
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===Subscripts and superscripts=== |
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Currently, there is no way to directly include subscripts or superscripts in a page name, unless you use the unicode characters (which do not work well in some browsers), the way they would normally be included in an article (using <nowiki><sub></nowiki> and <nowiki><sup></nowiki>). |
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Examples: [[NaKATPase]], [[Lp space]]. |
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Attempting to workaround using [[Unicode subscripts and superscripts]] does not work on all browsers (depending also on the installed fonts and operating system), and only a small number of subscript and superscript characters exist on Unicode. Such an attempt was briefly made for [[minor planet]]s, but was reverted after it became clear it was problematic. See also: [[Talk:2003 EL61#₆₁ characters ?]], [[Talk:2003 UB313/Archive 1#Titling Policy Strawman]], [[Wikipedia:Naming conventions (Unicode) (draft)#Superscripts and subscripts]], [[Wikipedia talk:Naming conventions (Unicode) (draft)#Subs/Supers]]. |
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However, superscripts ¹, ², and ³ (which also exist on [[ISO 8859-1]]) do not have the same browser support limitations and can be used without problems, as long as a redirect from the title without the superscript is used. |
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Also at least one name ([[TeX|T<sub><big>E</big></sub>X]]) is correctly written with a full size character lower than the normal ones. In page text this is achieved by combining sub and big but again this can't be done in article titles. |
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===Pictorial names=== |
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[[Image:Princesymbol.png]] was for many years the proper name of [[Prince (artist)|Prince]]. MediaWiki does not support including an image in the title of an article. Such images should be replaced by [[Unicode]] characters. On the other hand, the peace symbol used in ''[[Sign “☮” the Times]]'' is a valid Unicode character (U+262E), so it can be included in this title. |
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== Title length == |
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Titles must be less than or equal to 256 bytes long when encoded in utf-8. |
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:Note that pages whose title is the maximum length cannot be moved or undeleted. See [[Bugzilla:5570]] |
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== Configuration related limitations == |
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The following limitations are not due to the MediaWiki software but to the settings of the English language Wikipedia. See the appropriate policy pages. |
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=== Lower case first letter === |
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Titles linked to are forced to start with capital letters, although subsequent characters can have any case, i.e. |
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:<code>[[foo]]</code> is treated the same as <code>[[Foo]]</code> |
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The MediaWiki software is configured to transform the first letter to uppercase. |
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Examples of large articles affected by this problem include: |
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<!-- Please, DO NOT ADD ANY MORE EXAMPLES - this list is only a small list of examples, not every page affected. --> |
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* '''eBay''' is located at [[EBay]] |
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* '''blink-182''' is located at [[Blink-182]] |
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* '''iPod''' is located at [[IPod]] |
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<!-- Please, DO NOT ADD ANYMORE EXAMPLES - this list is only a small list of examples, not every page affected. --> |
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This also means that the page [[Long s]], on the character '''ſ''', cannot be moved to [[ſ]], as '''ſ''' is a lowercase letter whose uppercase form is [[S]]. |
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To notify readers of the problem, include the following text at the top of the article page: |
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'''<nowiki>{{</nowiki>[[Template:lowercase|lowercase]]|''lowercasetitle''<nowiki>}}</nowiki>''' |
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This will produce a notice like this: |
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{{lowercase|lowercasetitle}} |
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''(Note: This is due to the present lack of infrastructure for case-insensitive title matching with sane case-preserving semantics in the MediaWiki software. The first letter of any link is forced to be upper case in order to allow links to work naturally both at the beginning of a sentence and in the middle. In the future, there may be a way added to make the initial letter appear lower case without breaking hundreds of thousands of links on the wiki or creating new avenues of abuse; however, there is currently no way to do this.)'' |
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=== Colon === |
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Article titles with a colon preceded by the title of a [[Wikipedia:Namespace|namespace]] are interpreted as being pages in that namespace so can't be used for articles in the main namespace. Article titles that would clash with an interwiki link prefix are also disallowed by the software (with a "bad title" error). |
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Examples of articles afflicted by this problem include: |
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* '''Help: a Day in the Life''' is located at [[Help-a Day in the Life]] (Help: is a Wikipedia namespace) |
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* '''Q: Are We Not Men? A: We Are Devo!''' is located at [[Question: Are We Not Men? Answer: We Are Devo!]] (Q: is a shortcut to [[Wikiquote]]) |
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Before adding a new namespace or interwiki prefix, care must be taken to move any existing articles out of the way. However this is a task for server admins (developers) not wiki sysops or normal users. |
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Also, article titles cannot begin with a :. For example, <nowiki>[[:CueCat]]</nowiki> produces [[:CueCat]]. |
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== Browser support limitations == |
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:''See also: [[Wikipedia:Naming conventions (standard letters with diacritics)#Printability]]'' |
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For now, use only [[precomposed character]]s. Avoid using [[combining diacritical mark]]s. |
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Use the [[text normalization]] NFC [http://www.w3.org/TR/charmod-norm/]. |
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== See also == |
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*[[Capitalization]] |
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*[[m:Help:Page name]] |
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[[Category:Wikipedia naming conventions|Technical restrictions]] |
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[[bg:Уикипедия:Правила за наименование/Технически ограничения]] |
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[[ca:Viquipèdia:Anomenar pàgines (restriccions tècniques)]] |
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[[cs:Wikipedie:Název článku/Omezení]] |
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[[de:Wikipedia:Benennungskonventionen (technische Einschränkungen)]] |
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[[es:Wikipedia:Restricciones técnicas en títulos]] |
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[[eo:Vikipedio:Nomoj de titoloj (teknikaj limigoj)]] |
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[[pl:Wikipedia:Nazwa strony (ograniczenia)]] |
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Revision as of 02:11, 23 May 2006
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