MyWiki:WikiProject Check Wikipedia/List of errors

{{Wikipedia:WikiProject Check Wikipedia/tabs}}

Data for the list is compiled from the following locations: WPCleaner • AutoWikiBrowser • Auto-Formatter.   Fixes all cases     Warns of an error and fixes some cases     Warns of an error Quick link templates Target use example this list {{CW|##}} {{CW|50}} → CW Error #50 the CheckWiki report {{Checkwiki|##}} {{Checkwiki|50}} → -bin/checkwiki.cgi?project=enwiki&view=only&id=50 CW Error #50] # Priority Cosmetic Error WPC AWB AF Type Reason 01 (dump) Low Yes Template contains useless word "template:" Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Syntax error Article contains a template that includes the redundant prefix "template:" (eg. {{template:reflist}}). Removing it is usually useful when copying page in another Wikipedia. 02 (dump) High Sometimes <br>, <center> or <small> tag with incorrect syntax. Cases of <span /> and <div />. Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Syntax error A <br> or <br /> tag (note the slash) are the only standard formats. See the HTML standard for <br> or <small>. Mediawiki's Tidy tool will be replaced which may cause many now valid tags, such as </br> and <center />, to no longer work. 03 (dump) High No Reference list missing / disambiguation page with disallowed <ref> checkY checkY Display problem The article contains one or more <ref> tags, but is missing a {{Reflist}} or <references /> tag. Or a disambiguation page contains a disallowed <ref> tag, see WP:DABREF. 04 (dump) Mid No HTML text style element <a> Error creating thumbnail: Y Display problems The article contains one or more <a> tags. <a> tags will not show up in the rendered article and should use normal wikilink code for external links. 05 (dump) High No Comment tag with no correct end File:Check.svg File:Check.svg Display problem Missing closing comment tag. <!-- --> 06 Low No DEFAULTSORT with special characters Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Syntax error Don't use special lettering in DEFAULTSORT 07 (dump) Mid No Headlines all start with three "=" Error creating thumbnail: Y Error creating thumbnail: Y Accessibility First headline starts with "=== XY ===". It should be "== XY ==" header. This causes organisational and accessibility problems. 08 (dump) High No Headline should end with "=" Error creating thumbnail: Y checkY Display problem Headline should end with "=". 09 (dump) Low Yes Multiple categories on one line Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Against convention Two or more categories on one line. 10 High No Square brackets with no correct end checkY checkY Display problem Found a "[[" brackets with no corresponding "]]" brackets. 11 Off Yes HTML named entities Error creating thumbnail: Y Error creating thumbnail: Y Source readability HTML code found where a Unicode character could be used. For example, &auml; used instead of ä. It is difficult to comprehend for beginners. 12 Low ? HTML list elements File:Check.svg Source readability Detection of <ol>, <ul>...</ul> or <li> tags. Sometimes it is necessary to have these tags, especially in infoboxes. 13 (dump) High No <math> tag without correct match File:Check.svg File:Check.svg Display problem Missing </math> or <math> tag. 14 (dump) High No <source> tag without correct match File:Check.svg File:Check.svg Display problem Missing </source> or <source> tag. 15 (dump) High No <code> tag without correct match File:Check.svg File:Check.svg Display problem Missing </code> or <code> tag. 16 (dump) Low Yes Unicode control characters Error creating thumbnail: Y checkY Incident detection Detection of Unicode controls such as 0+FEFF, 0+200E, 0+200B and PUA characters. 17 (dump) Low Yes Category duplication Error creating thumbnail: Y Error creating thumbnail: Y Incident detection Unnecessary duplicate categories found. 18 Off Yes Category's first letter is small Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Against convention Against convention. If turned on again, check if CamelCase cases (e.g. Category:iPhone) have consensus to be changed to (e.g. Category:IPhone). 19 (dump) High No Headlines start with one "=" Error creating thumbnail: Y Accessibility A heading section starts with just one "=". This causes organisational and accessibility problems 20 (dump) Low Yes Symbol for dead Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Source readability The article had a &dagger; and not † 21 Off No Category: in English File:Check.svg Error creating thumbnail: Y Error creating thumbnail: Y Incident detection [[Category: ]] found when the native language should be used 22 Off Yes Category with space Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Against convention Category contains an unnecessary space, for example: [[ Category:ABC]] or [[Category : ABC]]. 23 (dump) High No <nowiki> without correct match File:Check.svg File:Check.svg Display problem Missing </nowiki> or <nowiki> tag. 24 (dump) High No <pre> without correct match File:Check.svg File:Check.svg Display problem Missing </pre> or <pre> tag. 25 (dump) Mid No Headline hierarchy Error creating thumbnail: Y checkY Accessibility After a section headline "==", there should not be a headline of "====". This causes organisational and accessibility problems. 26 (dump) Low Yes HTML text style element <b> (bold) Error creating thumbnail: Y Error creating thumbnail: Y Accessibility Source readability Found a <b> tag. Should use wiki markup of '''. See WP:Deviations 27 Off Yes Unicode syntax Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Source readability &#169; gives very little clue as to what this is supposed to be. Use &copy; or the symbol directly ©. Some entries, like the [ ] brackets should remain in unicode, or converted to {{!(}} and {{!)}} when used in external links. 28 (dump) High No Table with no correct end File:Check.svg Display problem An opening table has "{|" tag, but no corresponding closing "|}" tag. 29 (dump) High No <gallery> without correct match File:Check.svg File:Check.svg Display problem Missing </gallery> or <gallery> tag. 30 Off No Image without alternate description File:Check.svg Accessibility 31 Low ? HTML table element File:Check.svg Source readability A <table>, <tr> or <td> tag was found. Should use wiki markup instead. 32 High No Double pipe in a link checkY checkY Display problem Article contains a wikilink like [[text|text2|text3]] (displays as text2|text3), [[text||text3]] or [[text|text2||]]. or a broken wikilink inside a table. 33 Off ? HTML text style element <u> (underline) Error creating thumbnail: Y Against convention 34 High No Template programming element Error creating thumbnail: Y Syntax error A template programming element, such as {{{1}}}, #if or #switch, was found. They are usually not needed or a regular template can be substituted instead. 35 Off No Image gallery without description File:Check.svg checkY Accessibility 36 Low No Redirect with incorrect syntax File:Check.svg Error creating thumbnail: Y Error creating thumbnail: Y Display problem Redirect will not work 37 Low No DEFAULTSORT missing for titles with special letters Error creating thumbnail: Y Error creating thumbnail: Y Display problem Don't use special lettering for sorting. DEFAULTSORT should be set without the special lettering. 38 (dump) Low Yes HTML text style element <i> (italics) Error creating thumbnail: Y Error creating thumbnail: Y Accessibility Source readability Found a <i> tag. Should use wiki markup of ''. See WP:Deviations 39 Low No HTML text style element <p> File:Check.svg checkY Source readability Found a <p> tag. Usually should use wiki markup's blank line. Some tags, such as <ref> must use <p> due to a wikimedia bug. Paragraph breaks in lists may also require the use of <p>. 40 Low ? HTML text style element <font> File:Check.svg checkY checkY Against convention Found a <font> tag. This tag isn't used in HTML5 41 Off ? HTML text style element <big> File:Check.svg Against convention Found a <big> tag. This tag isn't used in HTML5 42 (dump) Low ? HTML text style element <strike> Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Accessibility Found a <strike> tag. This tag isn't used in HTML5. Use <s> instead. However, strikes shouldn't be used at all for accessibility reasons, so removing the strike is usually the best option. 43 High No Template with no correct end Error creating thumbnail: Y checkY Display problem Found a "{{" brackets with no corresponding "}}" brackets. 44 Low No Headlines with bold Error creating thumbnail: Y checkY Error creating thumbnail: Y Against convention A headline is all or partially bold. This should rarely be used and may or not be bold depending on the browser used. 45 Low No Interwiki duplication Error creating thumbnail: Y Error creating thumbnail: Y Display problem Duplicate entry. Now that interwiki links have been moved to wikidata, this error is possibly due to wikilinks that ought to be rendered that omits the leading : in [[:pt:Jorge de Mascarenhas]]. Should often be converted to internal redlinks per WP:BUILD/WP:REDLINK. 46 High No Square brackets without correct beginning checkY checkY Display problem Found a "]]" brackets with no corresponding "[[" brackets. 47 High No Template without correct beginning File:Check.svg Display problem Found a "}}" brackets with no corresponding "{{" brackets. 48 (dump) Low No Title linked in text Error creating thumbnail: Y Error creating thumbnail: Y Display problem A wikilink of the article's title was found. This creates an unnecessary circular wikilink per MOS:OVERLINK/WP:SELFREDIRECT and inappropriately bolds the linked word. 49 High No Headline with HTML Error creating thumbnail: Y Accessibility Source readability Found a headline created with HTML tags <h1>, <h2>, etc. per MOS:DEVIATIONS and MOS:HEAD. 50 Off Yes en dash or em dash Error creating thumbnail: Y Error creating thumbnail: Y 51 Mid No Interwiki before last headline Error creating thumbnail: Y Error creating thumbnail: Y Syntax error With interwikis no longer used, this usually means a syntax problem with a interlanguage link, e.g., [[de:foo]] instead of [[:de:foo]] 52 Low Yes Category before last headline Error creating thumbnail: Y Error creating thumbnail: Y Against convention Categories should be placed in the last section. If a link is intentional, use [[:Category:Foobar]] 53 Mid No Interwiki before last category Error creating thumbnail: Y Error creating thumbnail: Y Syntax error With interwikis no longer used, this usually means a syntax problem with a interlanguage link, e.g., [[de:foo]] instead of [[:de:foo]] 54 (dump) Low No Break in list Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Accessibility WP:LISTGAP 55 (dump) Low No Double <small> tags File:Check.svg checkY Error creating thumbnail: Y Accessibility Causes the text to be smaller than 85%. This goes against accessibility guidelines. 56 Off No Arrow as ASCII art Error creating thumbnail: Y The article had an arrow like "<--" or "-->" or "<==" or "==>". Write better this arrow with the Unicode "←" or "→" or "⇐" or "⇒". 57 Low No Headlines end with a colon Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Against convention Remove the : 58 Mid No Headline all CAPS Error creating thumbnail: Y Against convention Headlines should normally use sentence case, unless referring to titles of works and all-caps acronyms. 59 Low Yes Template value ends with a <br> Error creating thumbnail: Y Error creating thumbnail: Y Syntax error May cause whitespace errors (unconfirmed as of 2023) 60 High No Template parameter with a problem File:Check.svg Syntax error Usually means a broken wikilink inside a template. Can also mean the '=' sign is missing and replaced with another character. 61 Low No Reference before punctuation Error creating thumbnail: Y Error creating thumbnail: Y checkY Display problem <ref> comes after not before various punctuation marks (.,?:;!); see WP:REFPUNC 62 High No URL without http:// File:Check.svg Error creating thumbnail: Y Syntax error A URL was found that contained no http://. Example: [en.wikipedia.org Wikipedia] 63 Low No <small> in a <ref>, <sub> or <sup> Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Accessibility <ref> and <sub> tags already create smaller text. Adding a <small> would cause the text to be smaller than 85%. This goes against accessibility guidelines. 64 (dump) Low Yes Link equal to linktext Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Syntax error Finds cases of [[Foo|Foo]]. A Visual Editor bug causes wikilinks with italics or bold to be done incorrectly, usually some text outside the wikilink will also be bold or italized. Moreover, WP:NOPIPEDLINK. 65 Low Yes Image description ends with <br> Error creating thumbnail: Y Error creating thumbnail: Y Syntax error Clutter/Does nothing 66 Low No Image description with full <small> Error creating thumbnail: Y Error creating thumbnail: Y Accessibility Image description text is already smaller. Adding a <small> would cause the text to be smaller than 85%. This goes against accessibility guidelines. 67 Off No Reference after punctuation (see 61 instead) Error creating thumbnail: Y 68 Off No Link to other language Error creating thumbnail: Y 69 (dump) Mid No ISBN with incorrect syntax checkY checkY checkY Incorrect content Per WP:ISBN, the correct format is ISBN 978-2345-78383-1. Also finds ISBNs inside external links as Wikimagick doesn't work and ISBN template can cause problems. 70 (dump) Mid No ISBN with wrong length File:Check.svg Incorrect content ISBNs should have a length of 10 or 13 characters 71 (dump) Mid No ISBN with wrong position of X File:Check.svg Incorrect content X is only allowed in the last position of the ISBN 72 (dump) Mid No ISBN-10 with wrong checksum File:Check.svg Incorrect content ISBN checksum is wrong, verify the ISBN 73 (dump) Mid No ISBN-13 with wrong checksum File:Check.svg Incorrect content ISBN checksum is wrong, verify the ISBN 74 High No Link with no target checkY checkY Against convention Incorrect content [[|foobar]] links to foobar. The pipe is either unneeded, someone forgot to give a target, or someone vandalized the article. 75 Off ? Indented list Error creating thumbnail: Y 76 Low ? Link with encoded space Error creating thumbnail: Y checkY Error creating thumbnail: Y Source readability Found a URI encoded space, e.g., %20, inside a wikilink. This usually indicates a badly constructed external link. 77 Off No Image description with partial <small> Error creating thumbnail: Y 78 Low No Reference list duplication checkY Display problem Found two or more {{reflist}} or <references /> tags 79 Off No External link without description checkY 80 High No External link with a line break checkY checkY Display problem Found a newline character inside an external link or a missing closing bracket. A newline character causes the link not to work. 81 Low ? Reference duplication Error creating thumbnail: Y checkY Saves wikitext, and makes it easier to maintain the article, as you will only need to change one entry to update multiple instances of the same reference 82 Off ? Link to other wikiproject File:Check.svg 83 (dump) Mid No Headlines start with three "=" and later with two "=" Error creating thumbnail: Y Accessibility Organisational and accessibility problems. 84 Off No Section without content Error creating thumbnail: Y Error creating thumbnail: Y 85 Low ? Tags without content Error creating thumbnail: Y Error creating thumbnail: Y Source readability An empty <ref></ref> or <span></span> serves no purpose. This can be confusing to editors, and lead to issues if someone interacts with the empty tags by mistake. 86 High No External link with two brackets Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Display problem Found an external link surrounded by double brackets. Example: [[http://www.wikipedia.org Wikipedia]] # Priority Cosmetic Error WPC AWB AF Type Reason 87 Off No HTML named entities without semicolon Error creating thumbnail: Y checkY Display problem 88 Low Yes DEFAULTSORT with a blank at first position Error creating thumbnail: Y Error creating thumbnail: Y Error creating thumbnail: Y Against convention The space in {{DEFAULTSORT: DuBois, Lewis}} is useless and ignored by MediaWiki. 89 Low No DEFAULTSORT with no space after the comma File:Check.svg Error creating thumbnail: Y Syntax error The script found a DEFAULTSORT without a space after the comma {{DEFAULTSORT:DuBois,Lewis}}. The causes the article to be sorted as the first DuBois article. 90 Mid No Internal link written as an external link Error creating thumbnail: Y Error creating thumbnail: Y Syntax error The script found an external link that should be replaced with a wikilink. An example would be on enwiki [http://en.wikipedia.org/wiki/Larry_Wall Larry Wall] should be written as [[Larry Wall]]. 91 Mid No Interwiki link written as an external link Error creating thumbnail: Y Error creating thumbnail: Y Syntax error The script found an external link that should be replaced with an interwiki link. An example would be on enwiki [http://fr.wikipedia.org/wiki/Larry_Wall Larry Wall] should be written as [[:fr:Larry Wall]]. 92 (dump) Off No Headline double Error creating thumbnail: Y Accessibility This causes navigation and accessibility issues 93 Mid No External link with double http:// File:Check.svg Error creating thumbnail: Y Error creating thumbnail: Y Syntax error The script found an external link that had double http://. An example would be [http://http://www.google.com] 94 Mid No Reference tags with no correct match File:Check.svg checkY Display problem A <ref> or </ref> tag was found without the corresponding beginning or ending tag. 95 Low No Editor's signature or link to user or draft space File:Check.svg File:Check.svg Syntax error See Wikipedia:UPYES and WP:SIGNHERE 96 Mid No Table of Contents after first headline File:Check.svg Accessibility TOC should be placed at the end of the lead section of the text, before the first section heading. Users of screen readers do not expect any text between the TOC and the first heading. See WP:TOC. 97 Mid No TOC has material after it and before the first headline File:Check.svg Accessibility Screen readers don't process material that comes between the Table of Contents and first headline. See WP:TOC. 98 (dump) High No <sub> with no correct end Error creating thumbnail: Y File:Check.svg checkY Display problem Missing </sub> tag. Can cause display problems in Visual Editor and mw:Html5Depurate 99 (dump) High No <sup> with no correct end Error creating thumbnail: Y File:Check.svg checkY Display problem Missing </sup> tag. Can cause display problems in Visual Editor and mw:Html5Depurate 100 (dump) Low ? List tag with no correct match File:Check.svg Source readability List tag (<ol>, <ul> or <li>) with no correct match. 101 (dump) Low No Ordinal number found inside <sup> tags File:Check.svg Error creating thumbnail: Y Against convention Ordinal numbers should be in regular text, not inside <sup> tags See MOS:ORDINAL. 102 (dump) Mid No PMID with incorrect syntax checkY checkY checkY Incorrect content Per WP:PMID, the syntax should be PMID 4957203 Also checks if PMID is inside an external link as Magiclinks and {{PMID}} template won't work. 103 (dump) Mid No Pipe Template inside a wikilink File:Check.svg Error creating thumbnail: Y Syntax error The magic word {{!}} shouldn't be used inside a wikilink. | should be used instead. 104 (dump) Mid No Unbalanced quotes in ref name or illegal character or empty name checkY checkY checkY Syntax error The script either found unbalanced quotes in a reference tag (example: <ref name="ref 1>) or an illegal character per WP:REFNAME or an empty name (example: <ref name="">) 105 (dump) High No Heading should begin with "=" File:Check.svg Display problem A heading should begin with a "=". 106 (dump) Mid No ISSN with incorrect syntax checkY checkY Error creating thumbnail: Y Display problem The script found a problem with ISSN syntax. A normal ISSN looks like ISSN 3895-2372 or 3957-957X. There must be a - between the numbers (don't use dashes). Best if {{ISSN}} template is added. Also finds cases where the ISSN is inside an external linkss 107 (dump) Mid No ISSN with wrong length File:Check.svg Incorrect content The script checked the ISSN and found it not containing 8 characters. ISSN should have 8 characters. 108 (dump) Mid No ISSN with wrong checksum File:Check.svg Incorrect content The script checked the ISSN and found a problem with the checksum in the ISSN. Also see Category:Articles with invalid ISSNs. 109 (dump) High No Include tag error File:Check.svg Display problem The script found a problem with opening or closing tags for <includeonly>, <onlyinclude> or <noinclude> tags. This can cause transclusion problems. 110 Off No Include tag found File:Check.svg Display problem The script found a <includeonly>, <onlyinclude> or <noinclude> tags. 111 (dump) Off No Ref after last reference list File:Check.svg Display problem There are <ref> tags, after the {{reflist}} or <references> tags. 112 Low ? Bad or deprecated css attributes File:Check.svg Display problem Bad CSS should be fixed. Deprecated values should be updated for modern rendering. 113 Low No Newline inside a wikilink Display problem Found a newline character inside a wikilink. A newline character causes the wikilink not to work. Note: errors starting at #500 are not detected by CheckWiki, but only by WPC. 501 Bot No Spelling and typography checkY Proposals for fixing spelling and typography based on suggestions. 502 Off Yes Template namespace in template usage Error creating thumbnail: Y Error creating thumbnail: Y Replaced by CW Error #1 503 Off No Internal link in title File:Check.svg 504 (dump) Off No Reference in title File:Check.svg 505 Off No Image without alternative description File:Check.svg 506 Off No Reference with a numeric name File:Check.svg 507 Off No Gallery without caption File:Check.svg 508 Off No Missing template File:Check.svg 509 Off Yes Internal link could be compacted Error creating thumbnail: Y Error creating thumbnail: Y 510 Off No Non working pipe trick File:Check.svg 511 Off No Internal link written as external link File:Check.svg Error creating thumbnail: Y Replaced by CW Error #90 512 Off No Interwiki link written as external link File:Check.svg Error creating thumbnail: Y Replaced by CW Error #91 513 (dump) Off No Internal link inside external link File:Check.svg An external links contains an internal link, see Special:LintErrors/wikilink-in-extlink 514 Off No Missing named reference File:Check.svg 515 Off ? Title linked in text through redirect link File:Check.svg 516 Off Yes <br /> tags in main namespace File:Check.svg 517 Off ? strike tags File:Check.svg Error creating thumbnail: Y Replaced by CW Error #42 518 Bot ? nowiki tags in main namespace File:Check.svg nowiki tags are often not needed in main namespace 519 Off ? a tags in main namespace File:Check.svg Replaced by CW Error #4 520 Off ? Weird characters (pawns, snowmen) in main namespace File:Check.svg 521 Bot ? Date format in templates File:Check.svg 522 Off ? Empty title File:Check.svg An empty title (like == <nowiki /> ==) has been detected. 523 Off ? Duplicate image File:Check.svg 524 Low ? Duplicate arguments in template calls checkY See Category:Pages using duplicate arguments in template calls 525 Off ? Span tag File:Check.svg 526 (dump) Off ? Incorrect date link File:Check.svg Incorrect link to a date, like [[1985|2005]] 527 Low ? Reference with different content File:Check.svg Reference tags have the same name but different content, see Category:Pages with duplicate reference names 528 Off ? PMID magic link File:Check.svg PMID magic links will be removed from MW 529 Off ? ISBN magic link File:Check.svg ISBN magic links will be removed from MW 530 Off ? RFC magic link File:Check.svg RFC magic links will be removed from MW 531 Off ? Reference inside reference File:Check.svg Reference tags have been found inside an other reference tag 532 Bot ? Missing end tag checkY An opening tag has no matching end tag, see Special:LintErrors/missing-end-tag. 533 Bot ? Multi colon escape checkY Error creating thumbnail: Y A link has been created with a multi colon escape like Test, see Special:LintErrors/multi-colon-escape. 534 Bot ? Bogus image options checkY An image has been created with a bogus option, see Special:LintErrors/bogus-image-options. 535 Bot ? Tidy bug affecting font tags wrapping links checkY Tidy bug affecting font tags wrapping links, see Special:LintErrors/tidy-font-bug. 536 Bot ? Tidy whitespace bug checkY Tidy whitespace bug, see Special:LintErrors/tidy-whitespace-bug. 537 Bot ? Unclosed quotes in heading checkY Unclosed quotes in heading, see Special:LintErrors/unclosed-quotes-in-heading. 538 Bot Yes Whitespace characters after heading Error creating thumbnail: Y Error creating thumbnail: Y Extra whitespace characters are present after a heading (like == Title == ). 539 Bot ? Misnested tags checkY Misnested tags, see Special:LintErrors/misnested-tag. 540 Bot ? Missing end bold/italic checkY Missing end bold/italic, see Special:LintErrors/missing-end-tag. 541 Off ? Obsolete tag checkY checkY Obsolete tag, see Special:LintErrors/obsolete-tag. 542 Bot ? Empty ref tag checkY <ref> tag without any content like <ref></ref>. 543 (dump) Bot ? Pipe in external link checkY Error creating thumbnail: Y External link ending with a | like [https://test.org/toto.html| toto]. 544 Off ? Missing end template in a pair File:Check.svg A template designed to be paired with another template is alone, like {{col-begin}} without {{col-end}}. 545 Low ? Template with deprecated parameter File:Check.svg A template parameter is obsolete, like writing_credits in {{Soundtrack}}. 546 Off ? Article without categories File:Check.svg An article doesn't have any category, except for optional maintenance categories. 547 (dump) Off ? Empty list item File:Check.svg A list item is empty, like *. 548 (dump) Off ? Punctuation in link File:Check.svg A link ends with a punctuation, which should usually be better placed after the link (like [[Test|test,]]). 549 (dump) Off ? Split link File:Check.svg A link is split in several parts (like [[Test|te]][[Test|st]]). 550 (dump) Off ? Link without text File:Check.svg A link doesn't have any text, so it's not displayed (like [[Test|<nowiki/>]]). 551 (dump) Off ? Empty line File:Check.svg A line is only composed of non displayed elements (like ''<nowiki/>''). 552 (dump) Off ? Template ending with }}} File:Check.svg A templates end with }}} instead of }}. 553 (dump) Off ? <nowiki /> after internal link File:Check.svg An internal link is followed by a <nowiki /> tag. 554 (dump) Off ? <nowiki /> in <gallery>...</gallery> File:Check.svg A <nowiki /> tag is inside a <gallery>...</gallery> tag. 555 (dump) Off ? <nowiki /> in the text File:Check.svg A <nowiki /> tag is in the text. 556 (dump) Off ? External link File:Check.svg External link in the text of the article. 557 (dump) Off ? Missing whitespace before a link File:Check.svg A link is just after the preceding text. 558 (dump) Off ? Duplicated reference File:Check.svg A reference is used several times for the same text. 559 Off ? Separator between <ref /> tags File:Check.svg Consecutive <ref /> tags are not properly separated. 560 (dump) Off ? Duplicated attribute File:Check.svg A tag contains the same attribute several times. 561 Off ? Redirection with target text File:Check.svg An internal link targets a redirection but display the name of the final target (like [[REDIRECT|TARGET]] with REDIRECT being a redirect to TARGET). 562 (dump) Off ? Consecutive <nowiki /> tags File:Check.svg Several <nowiki /> tags are used one after another. 563 Off ? Unused parameters File:Check.svg checkY A template has unused empty parameters. 564 Off ? Unknown parameters File:Check.svg A template has unknown parameters. 565 (dump) Off ? <nowiki /> tag between bold/italic File:Check.svg A <nowiki /> tag is used between bold/italic. 566 Off ? <abbr /> tag File:Check.svg Abbreviation should use templates instead of <abbr /> tag. 567 Off ? Non-numeric formatnum arguments File:Check.svg <formatnum /> is used with non-numeric arguments. 568 Off ? Non-numeric formatnum arguments in template File:Check.svg <formatnum /> is used with non-numeric arguments through a template. 569 Off ? Non-breaking space in template argument name File:Check.svg A template call is using an argument with a non-breaking space in its name. It's usually a mistake. 570 Off ? mw-content-ltr/rtl without dir ou lang File:Check.svg Attributes mw-content-ltr/rtl are only relevant if there's also an attribute dir or lang. 571 Off ? Article with cite tag File:Check.svg <cite /> are usually not used directly in articles, they're often a leftover from CX2. 572 Off ? Unknown value for parameter File:Check.svg A value used in a template parameter is not part of the possible values. 573 Off ? Unnecessary non-breaking space &nbsp; File:Check.svg In some places, MediaWiki automatically replaces regular spaces by non-breaking spaces. 574 Off ? Unnecessary non-breaking space \u00A0 File:Check.svg In some places, MediaWiki automatically replaces regular spaces by non-breaking spaces. 575 Off ? Non-breaking space in internal links File:Check.svg Usually regular spaces should be used in links. Non-breaking spaces could be replaced by {{nobr}}. 576 Off ? Bogus image options through a template File:Check.svg See Special:LintErrors/bogus-image-options. 577 Off ? Invalid DOI File:Check.svg An incorrect DOI is being used. 578 Off ? Template in list File:Check.svg Some templates should never be used in a list, because they generate a list by themselves. 579 Off ? Tag simplification File:Check.svg Simplify some tags 580 Off ? Redundant templates File:Check.svg Some templates should never be used several times in the same article. 581 Off ? Reference with an empty name File:Check.svg If a <ref /> tag specifies a name, it shouldn't be blank. 582 Off ? Replacement character File:Check.svg Character \uFFFD shouldn't be used. 583 Off ? Bogus image options in gallery tags File:Check.svg See Special:LintErrors/bogus-image-options. # Priority Cosmetic Error WPC AWB AF Type Reason