Help:CS1 errors: Difference between revisions

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{{Wikipedia how to}}

Errors issued by Wikipedia's <code>&lt;ref></code> system, in which citation templates are typically embedded, can be found at [[Help:Cite errors]].

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<syntaxhighlight lang="css">.mw-parser-output span.cs1-hidden-error {display: inline;} /* display hidden Citation Style 1 error messages */</syntaxhighlight>

Even with this CSS installed, older pages in Wikipedia's cache may not have been updated to show these error messages even though the page is listed in one of the tracking categories. A [[WP:NULLEDIT|null edit]] will resolve that issue.

<syntaxhighlight lang="css">.mw-parser-output span.cs1-visible-error {display: none;} /* hide Citation Style 1 error messages */</syntaxhighlight>

==Most common errors==

<!-- Items listed here with ~10k or more -->

==<span id="accessdate_missing_url">|access-date= requires |url= </span>==

<section begin="accessdate_missing_url_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_accessdate_missing_url}}

When the online resource has a publication or other fixed date associated with it, {{para|access-date}} is of limited value though may be useful in identifying an appropriate archived version of the resource. Without {{para|url}}, {{para|access-date}} is not considered useful.

: {{error-small|flag}} – the flag portion of the URL path (if present; new form URLs only) is not 2 lowercase letters followed by an underscore: 'id_'

: {{error-small|liveweb}} – <code>liveweb.archive.org</code> is a deprecated form of the domain name

==<span id="archive_missing_date">|archive-url= requires |archive-date= </span>==

<section begin="archive_missing_date_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_archive_missing_date}}

To resolve this error, provide a value for {{para|archive-date}} (see acceptable date formats in [[MOS:DATEFORMAT]]). For web resources archived at archive.org,<ref name="archive.org" /> the archival date can be found in the {{para|archive-url}}; for resources archived at webcitation.org,<ref name="webcitation.org" /> the cache date is included in the archive header.

==<span id="archive_missing_url">|archive-url= requires |url= </span>==

To resolve this error, provide a value for {{para|url}}. For web resources archived at archive.org,<ref name="archive.org" /> the original URL can be found in the {{para|archive-url}} value; for resources archived at webcitation.org,<ref name="webcitation.org" /> the original URL is included in the archive header.

==<span id="arxiv_missing">|arxiv= required</span>==  

To resolve this error, ensure that the template has {{para|arxiv}} or {{para|eprint}} with a properly constructed value.

==<span id="asintld_missing_asin">|asin-tld= requires |asin=</span>==

<section begin="asintld_missing_asin_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_asintld_missing_asin|$1=asin-tld}}

To resolve this error, either add the missing ASIN or remove the 'broken' parameter.

==<span id="biorxiv_missing">|biorxiv= required</span>==  

To resolve this error, ensure that the template has {{para|biorxiv}} with a properly constructed value.

==<span id="chapter_ignored">|chapter= ignored</span>==

<section begin="chapter_ignored_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_chapter_ignored|$1=chapter}}

To resolve this error:

* for {{tl|cite news}}, {{para|department}} can be used to give the name of the newspaper's section, such as "Obituaries", or

* for {{tl|citation}}, remove {{para|work}} or its aliases such as {{para|website}} and place their content in {{para|title}} if appropriate

==<span id="invisible_char">&lt;char> character in |&lt;param>= at position ''n''</span>==

* [[replacement character]], U+FFFD

* [[hair space]], U+200A

* [[horizontal tab]], U+0009 (HT)

* [[line feed]], U+0010 (LF)

Because these characters are mostly invisible, the error message identifies the character's position in the parameter value counted from the left. Space characters between the assignment operator (the '=' sign) and the parameter value are not counted. If you move through the citation with the arrow keys then the cursor may stand still once at an invisible character, which can be removed with {{keypress|Delete}} or {{keypress|Backspace}}. If you copy-paste a string to the "Characters" field at https://r12a.github.io/app-conversion/ and click "View in UniView" then the position and name of all characters is shown.

{{#invoke:Cs1 documentation support|help_text_error_messages|err_invisible_char|$1=&lt;name> stripmarker|$2=<code class="cs1-code">{{pipe}}&lt;param>=</code>|$3={{var|n}}}}

To resolve strip marker errors, remove or replace the identified tag.  The error message identifies the strip marker's position in the parameter value counted from the left.  Space characters between the assignment operator (the '=' sign) and the parameter value are not counted when calculating the position.

==<span id="bad_arxiv">Check |arxiv= value</span>==  

To resolve this error, ensure that the {{para|arxiv}} value is correct.

==<span id="bad_asin">Check |asin= value</span>==  

If the {{para|asin}} value is correct and all-numeric, use {{para|isbn}} instead and delete any {{para|asin-tld}} parameters.  Articles with CS1 citations that use {{para|asin}} with all numeric values are categorized in {{cl|CS1 maint: ASIN uses ISBN}}.

==<span id="bad_asin_tld">Check |asin-tld= value</span>==  

<section begin="bad_asin-tld_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_bad_asin_tld}}

It is not necessary to provide {{para|asin-tld}} to specify the default (United States). If you want to specify this condition explicitly, a pseudo-value of <code>us</code> can be given to denote this.

If the value is correct, please report this at [[Help talk:Citation Style 1]], so that it can be added to the list of supported values.

==<span id="bad_bibcode">Check |bibcode= &lt;message></span>==  

To resolve this error, ensure that the {{para|bibcode}} value is correct.

==<span id="bad_biorxiv">Check |biorxiv= value</span>==  

To resolve this error, ensure that the {{para|biorxiv}} value is correct.

==<span id="bad_citeseerx">Check |citeseerx= value</span>==  

For instance, if you want to link to <code>http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.220.7880</code>, use {{para|citeseerx|10.1.1.220.7880}}.

==<span id="bad_date">Check date values in: |&lt;param1>=, |&lt;param2>=, ...</span>==

When {{cs1}} and {{cs2}} templates contain date-holding parameters, an automated test is done to see if the dates are real dates that comply with a [[Help:Citation_Style_1#Date_compliance_with_Wikipedia's_Manual_of_Style|subset of the date rules]] in  Wikipedia's Manual of Style, specifically checking for violations of [[Wikipedia:Manual of Style/Dates and numbers#Dates and years|MOS:DATEFORMAT]].

* years before 100 AD, including BCE/BC dates. Try using parameter {{para|orig-date}} instead.  

Future dates in {{para|date}} in CS1|2 citations are limited to current year + 1; that is, for {{#time:Y}}, citation dates in {{#time:Y|now +1 year}} are acceptable but citation dates in {{#time:Y|now +2 year}} and beyond are not.

The access date (in {{para|access-date}}) is checked to ensure that it contains a full date (day, month, and year) and is between 15 January 2001 (the founding date of Wikipedia) and today's date plus one day, because it represents the date that an editor viewed a web-based source to verify a statement on Wikipedia. Because editors may be in time zones that are one day ahead of the UTC date, one extra day is accepted.

   

{{anchor|Date Fix Table|Dates|DateFixTable}}

{{anchor|ExamplesOfUnacceptableDates}}

| Hyphen in date range (use en dash) || {{para|plain=y|date|2002{{red|-}}2003}} || {{para|plain=y|date|2002{{green|–}}2003}}

|-

|-

|-

| Missing space around en dash for range of full dates || {{para|plain=y|date|April 2003{{red|–}}May 2004}} || {{para|plain=y|date|April 2003 {{green|–}} May 2004}}

|-

|-

|-

| Season capitalization || {{para|plain=y|date|{{red|s}}pring 2011}} || {{para|plain=y|date|{{green|S}}pring 2011}}

| Comma in season || {{para|plain=y|date|Winter{{red|,}} 1900–1901}} || {{para|plain=y|date|Winter 1900–1901}}

|-

|-

|-

|-

|-

|-

| One-digit month or day || {{para|plain=y|date|2007-{{red|3}}-{{red|6}}}} || {{para|plain=y|date|2007-{{green|03}}-{{green|06}}}}

| Wikified date || {{para|plain=y|date|{{red|<nowiki>[[</nowiki>}}April 1{{red|<nowiki>]]</nowiki>}}, {{red|<nowiki>[[</nowiki>}}1999{{red|<nowiki>]]</nowiki>}} }} || {{para|plain=y|date|{{green|April 1, 1999}}}}

|-

|-

|-

|}

In very rare cases, publishers have released works with a DOI deviating from the standard form. If you are certain that such a non-conforming DOI truly corresponds to the published work, then you can add [[Help:Citation_Style_1#Accept-this-as-written_markup|accept-this-as-written markup]] around the identifier to suppress the error message. (Do not use this markup for DOIs, which are ''inactive'' rather than ''non-conforming''. Instead, use {{para|doi-broken-date}} for them.)

==<span id="bad_hdl">Check |hdl= value</span>==

To resolve this error, ensure that the {{para|hdl}} value is correct.

==<span id="bad_isbn">Check |isbn= value</span>==

See also [[Wikipedia:ISBN]].

==<span id="bad_ismn">Check |ismn= value</span>==

To resolve this error, ensure that the {{para|ismn}} value is correct, that only one ISMN is used, that the proper optional separators are used, and that no other text is included. Make sure that the ISMN contains exactly 13 digits.

==<span id="bad_issn">Check |issn= value</span>==

<section begin="bad_issn_help_text" />{{help desk}}

*{{#invoke:Cs1 documentation support|help_text_error_messages|err_bad_issn|$1=_}}

*{{#invoke:Cs1 documentation support|help_text_error_messages|err_bad_issn|$1=e}}

{{cs1}} and {{cs2}} templates that contain {{para|issn}} and/or {{para|eissn}} are checked to ensure that the [[ISSN]] is the proper length (eight digits) and that the final [[check digit]] validates according to the ISSN specification. Only one each of ISSN and eISSN is allowed in this field because the whole {{para|issn}} and {{para|eissn}} values are included in the citation's [[COinS]] [[metadata]]. See also [[Wikipedia:COinS]]. (If relevant, they can be specified using {{para|id|{{tlp|ISSN|...}} {{tlp|EISSN|...}}}} instead.)

The ISSN and eISSN are always rendered as two four-digit numbers separated with a hyphen.

In very rare cases, publishers have released works with a malformed identifier. If you are certain that a non-conforming identifier truly corresponds to the published work, then you can add [[Help:Citation_Style_1#Accept-this-as-written_markup|accept-this-as-written markup]] around the identifier to suppress the error message. In some cases, works may have been reissued with a corrected identifier. Use the corrected one when possible.

==<span id="bad_jfm">Check |jfm= value</span>==

To resolve this error, ensure that the {{para|jfm}} value is correct.

==<span id="bad_jstor">Check |jstor= value</span>==

To resolve this error, ensure that the {{para|jstor}} value is correct.

==<span id="bad_lccn">Check |lccn= value</span>==

When receiving this error, be on the lookout for publishers who omitted leading zeros in the LCCN following the two or four digit year. For example, an LCCN that is [https://catalog.loc.gov/vwebv/search?searchCode=LCCN&searchArg=92035247&searchType=1&permalink=y properly 92-035427] could be shortened in the printed work to [https://books.google.com/books?id=3ocPU-S9gloC&q=35247 92-35247]. When experimenting with inserting omitted zeroes, cross-check the finished number against the LCCN permalinks online.

==<span id="bad_message_id">Check |message-id= value</span>==

To resolve this error, ensure that the {{para|message-id}} value is correct, that it contains <code>@</code> and is not wrapped in <code><...></code> characters.

==<span id="bad_mr">Check |mr= value</span>==

To resolve this error, ensure that the {{para|mr}} value is correct.

==<span id="bad_oclc">Check |oclc= value</span>==

A tip for fixing this error: Editors sometimes place valid [[ISBN]], [[LCCN]], [[ASIN]], or other identifiers in {{para|oclc}}.  

==<span id="bad_ol">Check |ol= value</span>==

To resolve this error, ensure that the {{para|ol}} value is correct. Do not include "OL" in the value.

==<span id="bad_osti">Check |osti= value</span>==

If the value is correct and lower than 1018 or larger than the currently configured limit of {{#invoke:Cs1 documentation support|id_limits_get|osti}}, please report this at [[Help talk:Citation Style 1]], so that the limit can be updated.

==<span id="bad_paramlink">Check |&lt;param>-link= value</span>==

<section begin="bad_paramlink_help_text" />{{help desk}}

* {{#invoke:Cs1 documentation support|help_text_error_messages|err_bad_paramlink|$1=<code class="cs1-code">&lt;param>-link</code>}}

* {{#invoke:Cs1 documentation support|help_text_error_messages|err_bad_paramlink|$1=<code class="cs1-code">&lt;param></code>}}

This error occurs when any of these {{para|&lt;param>-link}} parameters contain a wikilink or a URL, or they contain any of the characters not permitted in Wikipedia article titles per [[WP:TITLESPECIALCHARACTERS]] (except <code>_</code> (underscore), used as a replacement for spaces, and <code>#</code>, used as a [[fragment identifier]] when linking to article sections).  The prohibited characters are: <code>&lt; > [ ] | { }</code>.

: <code><nowiki>[[:fr:Période d'exil de Caravage]]</nowiki></code>

To resolve this error, do one of the following:

|}-->

==<span id="bad_pmc">Check |pmc= value</span>==

If the value is correct and larger than the currently configured limit of {{#invoke:Cs1 documentation support|id_limits_get|pmc}}, please report this at [[Help talk:Citation Style 1]], so that the limit can be updated.

==<span id="bad_pmid">Check |pmid= value</span>==

If the value is correct and larger than the currently configured limit of {{#invoke:Cs1 documentation support|id_limits_get|pmid}}, please report this at [[Help talk:Citation Style 1]], so that the limit can be updated.

==<span id="bad_rfc">Check |rfc= value</span>==

If the value is correct and larger than the currently configured limit of {{#invoke:Cs1 documentation support|id_limits_get|rfc}}, please report this at [[Help talk:Citation Style 1]], so that the limit can be updated.

==<span id="bad_sbn">Check |sbn= value</span>==

In very rare cases, publishers have released books with malformed SBNs. If you are certain that a non-conforming SBN truly corresponds to the published work, then you can add [[Help:Citation_Style_1#Accept-this-as-written_markup|accept-this-as-written markup]] around the identifier to suppress the error message. In many cases, books may have been reissued with a corrected SBN. Use a corrected SBN when possible.

==<span id="bad_ssrn">Check |ssrn= value</span>==

If the value is correct and larger than the currently configured limit of {{#invoke:Cs1 documentation support|id_limits_get|ssrn}}, please report this at [[Help talk:Citation Style 1]], so that the limit can be updated.

==<span id="bad_s2cid">Check |s2cid= value</span>==

If the value is correct and larger than the currently configured limit of {{#invoke:Cs1 documentation support|id_limits_get|s2cid}}, please report this at [[Help talk:Citation Style 1]], so that the limit can be updated.

==<span id="bad_url">Check |url= value</span>==

* certain letters of the [[.net]] TLD (i, q)

Third- and subsequent-level domain names are not checked.  The path portion of the URL is not checked.

To resolve this error, ensure that {{para|url}} and other URL parameters contain valid URLs.  Online tools are available to [[Internationalized domain name|internationalize]] URLs that are written in non-Latin scripts:

* {{cite web |url=https://www.verisign.com/en_US/channel-resources/domain-registry-products/idn/idn-conversion-tool/index.xhtml?loc=en_US |title=IDN Conversion Tool |website=Verisign }}

==<span id="bad_zbl">Check |zbl= value</span>==

To resolve this error, ensure that the {{para|zbl}} value is correct.

==<span id="param_unknown_empty">Cite has empty unknown parameter: &lt;param></span>==

To resolve this error, remove the extra pipe, correct the parameter name, or remove the parameter from the CS1|2 template.

==<span id="missing_periodical"></span>Cite &lt;template> requires |&lt;param>===

In some cases, an incorrect template has been used (e.g. {{tlx|cite journal}} for a web page, book, or standalone document). The appropriate resolution in these cases is to change the incorrect template to {{tlx|cite web}}, {{tlx|cite book}}, or a different, more appropriate template.

==<span id="deprecated_params"></span>Cite uses deprecated parameter |&lt;param>= ==

<section begin="deprecated_params_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_deprecated_params|$1=&lt;param>}}

To resolve this error, use a supported parameter.

{|class="wikitable"  

|+ Deprecated CS1/CS2 parameters

! Replace with

|-

|-

|-

| {{para|lay-source}}

|-

| {{para|lay-url}}

|-

|-

| {{para|author-first}}

| October 2020

| October 2020

|-

|-

|-

| {{para|display-authors}}

| January 2021

| {{para|pmc-embargo-date}}

| October 2020

|-

| {{para|event-format}}

| {{para|name-list-style|amp}}

| January 2021

|-

| {{para|nocat}}

| {{para|no-tracking}}

| October 2020

|-

| {{para|notracking}}

| October 2020

|-

| {{para|url-access|registration}}

| January 2020

|-

| {{para|seriesnumber}}

| January 2021

|-

| January 2021

|-

| {{para|url-access|subscription}}

| January 2020

==<span id="generic_title">Cite uses generic title</span>==

CS1|2 maintains a short list of 'titles' that are typically not the title of the cited source.  Some examples are:

If you are aware of other common place-holder titles, please report them at [[Help talk:Citation Style 1]], so that they can be added to the list.

To resolve this error, replace the place-holder title with the source's actual title.

==<span id="citeseerx_missing">|citeseerx= required</span>==  

To resolve this error, ensure that the template has {{para|citeseerx}} with a properly constructed value.

==<span id="class_ignored">|class= ignored</span>==

To resolve this error, remove {{para|class}}.

==<span id="contributor_ignored">|contributor= ignored</span>==

Only used in book citations, {{para|contributor}} identifies the author of a contribution, typically an afterword, foreword, introduction, preface, etc., to another (primary) author's work.  This error occurs when {{para|contributor}} is used in a template that is not {{tlx|cite book}} or {{tlx|citation}} or is one of these two templates and one of the {{para|work}} parameter aliases is set.   

==<span id="contributor_missing_required_param">|contributor= requires |&lt;param>= </span>==

Only used in book citations, {{para|contributor}} identifies the author of a contribution, typically an afterword, foreword, introduction, preface, etc., to another (primary) author's work.  As such, the primary author is required ({{para|author}} or appropriate alias) as is the title of the contribution ({{para|contribution}}).   

==<span id="doibroken_missing_doi">|doi-broken-date= requires |doi=</span>==

<section begin="doibroken_missing_doi_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_doibroken_missing_doi|$1=doi-broken-date}}

To resolve this error, either add the missing DOI or remove the 'broken' parameter.

<section begin="extra_text_edition_help_text" />{{help desk}}

{{#invoke:Cs1 documentation support|help_text_error_messages|err_extra_text_edition}}

To resolve this error, remove the extraneous text from the parameter value.

==<span id="empty_citation">Empty citation</span>==

To resolve this error, add appropriate parameter identifiers, translate foreign language parameter names to their English equivalents, or replace the CS1/CS2 template with a more appropriate template.

== <span id="explicit_et_al">Explicit use of et al.</span> ==

Use the {{para|display-authors}} parameter instead (or other applicable {{para|display-''<names>''}} parameter), as documented at [[Help:Citation Style 1#Display options]].

==<span id="param_has_ext_link">External link in |&lt;param>=</span>==

<section begin="param_has_ext_link_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_param_has_ext_link|$1={{pipe}}&lt;param>=}}

To resolve this error, remove the external link from the identified parameter.  Consider placing the external link in a more appropriate parameter:

* for {{para|chapter}}, the URL may belong in {{para|chapter-url}}.

* for other parameters, it may belong in {{para|url}}.

==<span id="first_missing_last">|&lt;first>''n''= missing |&lt;last>''n''=</span>==

To resolve this error, ensure that each {{para|&lt;first>''n''}} has a corresponding {{para|&lt;last>''n''}}.  

==<span id="format_missing_url">|format= requires |url= </span>==

To resolve this error, remove {{para|format}} or {{para|chapter-format}}; define {{para|url}} or {{para|chapter-url}}; or change {{para|format}} to {{para|type}} (or to {{para|chapter-format}} if {{para|chapter-url}} is used without {{para|url}}.

==<span id="disp_name">Invalid |display-&lt;names>=&lt;value></span>==

* Change the <code>&lt;value></code> of the {{para|display-&lt;names>}} parameter to <code>etal</code>, which will cause "et al" to display after the last <code>&lt;name></code>.

==<span id="invalid_param_val">Invalid &lt;param>=&lt;value></span>==

| {{para|no-tracking}}

|-

|-

| {{para|doi-access}}

|-

| {{para|osti-access}}

|-

| {{para|s2cid-access}}

| {{para|section-url-access}}

|-

|}

==<span id="script_parameter">Invalid |script-&lt;param>=: &lt;type></span>==

{{#invoke:Cs1 documentation support|script_lang_lister}}<!-- makes a language code: name list from the master list in [[Module:Citation/CS1/Configuration]] -->

<section begin="extra_text_issue_help_text" />{{help desk}}

The templates are responsible for static text rendered in the citation. When {{para|issue}} or {{para|number}} is used in a template, cs1|2 formats the issue number according to the style corresponding with the publication type associated with the used citation template.

The templates emit this error message when various forms of issue or number prefixes (like <code>Iss.</code> or <code>No.</code>) are found in the value assigned to {{para|issue}} or {{para|number}}.

==<span id="apostrophe_markup">Italic or bold markup not allowed in: |&lt;param>=</span>==

To resolve this error, remove wiki markup from the named parameter's value and ensure that the template is using the correct parameters; when citing a newspaper, use {{para|newspaper}} for the newspaper's name, not {{para|publisher}}, etc.

==<span id="missing_name">Missing |&lt;name>''n''=</span>==

To resolve this error, ensure that the numbering of the {{para|&lt;last>{{var|n}}}} parameters increments properly.  

==<span id="missing_title">Missing or empty |title= </span>==

Some legitimate titles will contain a CS1|2 parameter name followed by an equal sign. In that case, enclose the equal sign in nowiki tags, like this: {{tag|nowiki|content={{=}}}}.  For most other cases, simply add the missing pipe.

==<span id="redundant_parameters">More than one of |&lt;param1>=, |&lt;param2>=, and |&lt;param3>= specified</span>==

To resolve this error, choose one name-list-style.  Use the chosen style for both of the author and editor name-lists.

<section begin="extra_text_pages_help_text" />{{help desk}}

The templates are responsible for static text rendered in the citation.  When {{para|page}}/{{para|p}}, {{para|pages}}/{{para|pp}}, {{para|quote-page}} or {{para|quote-pages}} is used in a template, cs1|2 inserts the appropriate pagination prefix 'p.' or 'pp.' ahead of the value in the parameter so:

To resolve this error, remove the extraneous text from the parameter value.

==<span id="param_access_requires_param">&#124;&lt;param>-access= requires &#124;&lt;param>=</span>==

To resolve this error, either provide a value for the parameter, or remove the access level specification.

==<span id="embargo_missing_pmc">|pmc-embargo-date= requires |pmc=</span>==

<section begin="embargo_missing_pmc_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_embargo_missing_pmc|$1=pmc-embargo-date}}

To resolve this error, either add the missing PMC or remove the 'broken' parameter.

==<span id="ssrn_missing">|ssrn= required</span>==  

To resolve this error, ensure that the template has {{para|ssrn}} with a properly constructed value.

==<span id="text_ignored">Text "????" ignored</span>==

To resolve this error, remove the extraneous text, add '=', add an appropriate parameter name from the template you're using to complete the parameter, or properly encode vertical bars in URLs and titles.

<section begin="trans_missing_title_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_trans_missing_title|$1=&lt;param>|$2=&lt;param>|$3=&lt;param>}}

To resolve this error, provide the original language title for {{para|title}} or chapter title for {{para|chapter}}. Consider adding {{para|language}} if not already part of the citation.

==<span id="parameter_ignored">Unknown parameter |&lt;param>= ignored<span id="parameter_ignored_suggest"> </span></span>==

To resolve this error, replace the erroneous parameter name with a correct one, possibly using the suggested name. Ensure that the parameter's name is correctly spelled and that there are no characters except spaces between the parameter's name and the leading vertical bar (|) or trailing equals sign (=). A list of valid parameters can be found by consulting [[Help:Citation Style 1]] or visiting the description page of the specific template being used, such as {{tlx|cite web}}, {{tlx|cite book}}, {{tlx|cite journal}}, etc. Consider moving information associated with the unknown parameter into an appropriate parameter or to a section of the article's talk page for preservation.

==<span id="wikilink_in_url">URL–wikilink conflict</span>==

External links in a rendered citation are a combination of url-holding parameters, {{para|url}}, {{para|chapter-url}}, etc., with title-holding parameters, {{para|title}}, {{para|chapter}}, etc. Title-holding parameters may be [[wikilink]]ed to another Wikipedia article but not when there is a matching url-holding parameter in the citation. When this condition occurs, the wikilink is suppressed, the wiki markup ignored, and the rendered citation links to the external site.

This type of error may also occur in identifier-based templates ({{tlx|cite doi}}, etc.). When this happens, the error message is shown in the article but the error is actually located in the identifier-based citation template.

To resolve errors in identifier-based citation templates, the template must be edited to correct the error. Exercise caution when editing these templates because identifier-based citation templates are often used in multiple articles.

==<span id="vancouver">Vancouver style error</span>==

This error is reported for citations that use {{para|vauthors}}, {{para|veditors}}, {{para|name-list-style|vanc}}.

Similarly, Chinese hyphenated given names may appear in PubMed listings.  For example: 'Wang Hsien-yu' may be listed on PubMed as 'Wang Hy' which will result in a Vancouver error.  When this occurs, and upon verification that such names are correct, wrap them in doubled parentheses.

* [https://www.ncbi.nlm.nih.gov/books/NBK7282/box/A33071/?report=objectonly Surnames with hyphens and other punctuation in them]

* [https://www.ncbi.nlm.nih.gov/books/NBK7282/box/A33081/?report=objectonly Other surname rules]

* [https://www.ncbi.nlm.nih.gov/books/NBK7282/box/A33152/?report=objectonly Organizations as author]

** CS1|2 does not obey the semicolon-as-separator rule.  Separate corporate and organizational names from each other and from individual names with a comma; wrap corporate and organizational names in doubled parentheses as described above.

<section begin="extra_text_volume_help_text" />{{help desk}}

The templates are responsible for static text rendered in the citation. When {{para|volume}} is used in a template, cs1|2 formats the volume value according to the style corresponding with the publication type associated with the used citation template.

To resolve this error, remove the extraneous text from the parameter value.

==Notes==

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{{reflist |group=lower-alpha |refs=

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