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| {{Documentation subpage}}
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| <includeonly>{{High-risk|280,000+}}</includeonly>
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| {{shortcut|T:HAT}}
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| {{lua|Module:Hatnote}}
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| This template produces formatted text, following the guideline for a '''[[WP:HATNOTE|Wikipedia hatnote]]'''.
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| :<code><nowiki>{{hatnote|Example hatnote text.}}</nowiki></code> →<br><!-- a construct to show hatnote as expected (using newline) -->
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| {{hatnote|Example hatnote text.}}
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| Broadly speaking, a hatnote should answer a readers' question (maybe preemptively): ''Am I on the right page?''
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| {{TOC limit}}
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| == Function ==
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| This template is primarily used to add a correctly formatted ''hatnote'' to a page. Often, but not always, this is a ''disambiguation link'' at the top of article pages. It places an HTML <code>div-</code> / <code>div</code> block around the text entered as its only argument, which provides standardized formatting (contents are indented and italicized in most displays); it also isolates the contained code to make sure that it is interpreted correctly.
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| This template is also used as the "meta-template" for additional specialized disambiguation link templates; see [[:Category:Hatnote templates]] for a list.
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| The template does not automatically create links of any kind. Links and other desired formatting must be explicitly added, using normal [[Wikipedia:Cheatsheet|Wikipedia markup]].
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| == Usage ==
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| ; Basic usage:
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| {{hatnote|''text''}}
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| ; All parameters:
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| {{hatnote|''text''|extraclasses=''extra classes''|selfref=''yes''|category=''no''}}
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| == Parameters ==
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| This template accepts the following parameters:
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| * <code>1</code> - the hatnote text. (required)
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| * <code>extraclasses</code> - any extra CSS classes to be added. For example, the {{tl|see also}} template adds the classes {{para|extraclasses|boilerplate seealso}}.
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| * <code>selfref</code> - if set to "yes", "y", "true" or "1", adds the CSS class "selfref". This is used to denote self-references to Wikipedia. See [[Template:Selfref]] for more information.
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| * <code>category</code> - if set to "no", "n", "false", or "0", suppresses the error tracking category ([[:Category:Hatnote templates with errors]]). This only has an effect if the first positional parameter (the hatnote text) is omitted.
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| == Example ==
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| * <code><nowiki>{{hatnote|Example hatnote text}}</nowiki></code> → {{hatnote|Example hatnote text}}
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| == Errors ==
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| If no hatnote text is supplied, the template will output the following message:
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| * {{hatnote|category=no}}
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| If you see this error message, it is for one of four reasons:
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| # No parameters were specified (the template code was <code><nowiki>{{hatnote}}</nowiki></code>). Please use <code><nowiki>{{hatnote|</nowiki>''text''<nowiki>}}</nowiki></code> instead.
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| # Some parameters were specified, but the hatnote text wasn't included. For example, the template text <code><nowiki>{{hatnote|extraclasses=seealso}}</nowiki></code> will produce this error. Please use (for example) <code><nowiki>{{hatnote|</nowiki>''text''<nowiki>|extraclasses=seealso}}</nowiki></code> instead.
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| # The hatnote text was specified, but that text contains an equals sign ("="). The equals sign has a special meaning in template code, and because of this it cannot be used in template parameters that do not specify a parameter name. For example, the template code <code><nowiki>{{hatnote|2+2=4}}</nowiki></code> will produce this error. To work around this, you can specify the parameter name explicitly by using <code>1=</code> before the hatnote text, like this: <code><nowiki>{{hatnote|1=2+2=4}}</nowiki></code>.
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| # You tried to access [[Module:Hatnote]] directly by using <code><nowiki>{{#invoke:hatnote|hatnote|</nowiki>''text''<nowiki>}}</nowiki></code>. Use of #invoke in this way has been disabled for performance reasons. Please use <code><nowiki>{{hatnote|</nowiki>''text''<nowiki>}}</nowiki></code> instead.
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| If you see this error message and are unsure of what to do, please post a message on [[Template talk:Hatnote]], and someone should be able to help you.
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| Pages that contain this error message are tracked in [[:Category:Hatnote templates with errors]].
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| == Technical details ==
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| The HTML code produced by this template looks like this:
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| * <code><nowiki><div role="note" class="hatnote"></nowiki>''hatnote text''<nowiki></div></nowiki></code>
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| The code is produced by [[Module:Hatnote]].
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| {{Hatnote templates}}
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| {{Collapse top|TemplateData}}
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| {{TemplateDataHeader}}
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| <templatedata>
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| {
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| "description": "Template for creating a standard Wikipedia hatnote. A hatnote is a short note placed at the top of an article to provide disambiguation of closely related terms or summarise a topic, explaining its boundaries.",
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| "params": {
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| "1": {
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| "label": "Text",
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| "description": "This field should contain the text that will be displayed in the hatnote.",
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| "type": "string",
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| "required": true
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| },
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| "extraclasses": {
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| "type": "string/line",
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| "label": "Extra classes",
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| "description": "Extra CSS classes to be added to the <div> tags surrounding the hatnote text."
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| },
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| "selfref": {
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| "type": "string/line",
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| "label": "Self reference",
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| "description": "Set to \"yes\" if the hatnote text is a self-reference to Wikipedia that would not make sense on mirrors or forks of the Wikipedia site. (E.g. \"For the Wikipedia Sandbox, see [[WP:SAND]]\".)"
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| },
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| "category": {
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| "label": "Category",
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| "description": "Set to \"no\", \"n\", \"false\", or \"0\" to suppresses the error tracking category (Category:Hatnote templates with errors). This only has an effect if the hatnote text is omitted."
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| }
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| }
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| }
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| </templatedata>
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| {{Collapse bottom}}<includeonly>{{#ifeq:{{SUBPAGENAME}}|sandbox||
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| [[Category:Hatnote templates| ]]
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| [[Category:Cross-reference templates]]
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| }}</includeonly>
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