Editing Help:CS1 errors (section)

==<span id="bad_paramlink">Check |&lt;param>-link= value</span>==
<section begin="bad_paramlink_help_text" />{{help desk}}
{{plainlist}}
* {{#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>}}
{{endplainlist}}

These link-holding parameters and their matching title-/name-holding parameters are combined to create a working [[wikilink]] to a related article.
{| class="wikitable"
|+Parameters combined to make wikilinks
!Link-holding parameter !! title-/name-holding parameter(s)
|-
| {{para|author-link}}{{dagger}} || {{para|author}}, {{para|last}}, {{para|last}} + {{para|first}}
|-
| {{para|contributor-link}}{{dagger}} || {{para|contributor}}, {{para|contributor-last}}, {{para|contributor-last}} + {{para|contributor-first}}
|-
| {{para|editor-link}}{{dagger}} || {{para|editor}}, {{para|editor-last}}, {{para|editor-last}} + {{para|editor-first}}
|-
| {{para|episode-link}} || {{para|episode}}
|-
| {{para|interviewer-link}}{{dagger}} || {{para|interviewer}}, {{para|interviewer-last}}, {{para|interviewer-last}} + {{para|interviewer-first}}
|-
| {{para|series-link}} || {{para|series}}
|-
| {{para|subject-link}}{{dagger}} || {{para|subject}}
|-
| {{para|title-link}} || {{para|title}}
|-
| {{para|translator-link}}{{dagger}} || {{para|translator}}, {{para|translator-last}}, {{para|translator-last}} + {{para|translator-first}}
|-
|colspan="2"|{{dagger}} Parameters checked for this error may also have the enumerated forms: {{para|author-link{{var|n}}}} or {{para|author{{var|n}}-link}} etc.
|}

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>.

The {{para|&lt;param>-link}} parameter value should contain only the title of a Wikipedia article or a link to a section of a Wikipedia article. [[Module:Citation/CS1]] checks the {{para|&lt;param>-link}} parameter values for wikimarkup and for a [[URI scheme]] (<code>http://</code>, <code>https://</code>, the protocol relative scheme <code>//</code>, etc.).  Interlanguage links in any of the {{para|&lt;param>-link}} parameters require a leading colon:
: <code><nowiki>:fr:Période d'exil de Caravage</nowiki></code>
While primarily intended to catch the errors mentioned above, Module:Citation/CS1 will also catch malformed interlanguage wikilinks wherever they occur.  Interlanguage wikilinks that have the form:
: <code><nowiki>[[fr:Période d'exil de Caravage]]</nowiki></code>
do not create visible clickable links in the article text.  Instead, these links appear in the left pane in the languages list.  Module:Citation/CS1 disables interlanguage links in this form and emits an error message.  The correct form is:
: <code><nowiki>[[:fr:Période d'exil de Caravage]]</nowiki></code>

This error can also be caused when:
* there is a {{para|&lt;param>-link}} value and the matching {{para|&lt;param>}} parameter contains a wikilink.<!--formatting template such as {{tl|smallcaps}} or {{tl|IAST}}, which should not be used in CS1 or CS2 templates.-->
* {{para|first}} and {{para|&lt;param>-first}} (and enumerated forms) contain a wikilink

To resolve this error, do one of the following:
* Ensure that the {{para|&lt;param>-link}} value is the full name of a Wikipedia article (without brackets) or a section of an article, and not a link to an external web site.
* Make sure that there are no wikilinks in the matching {{para|&lt;param>}} parameters. 
* If you want to link to a URL outside of Wikipedia, move the link to {{para|url}} or a similar parameter, if one is available in the template you are using.
<!--* Make sure that there are no illegal characters in the paired parameters. These templates or HTML entities can be used to replace illegal characters in the title-holding parameter:
{| class="wikitable" style="margin-left: 6.4em"
|+ Replacements for prohibited wikilink title characters
! < !! > !! [ !! ] !! {{pipe}} !! {  !! }
|-
| &amp;lt; || &amp;gt; || &amp;#91; || &amp;#93; || &amp;#124; || &amp;#123; || &amp;#125;
|-
| colspan="2"|&nbsp;||colspan="2" style="text-align: center;" | [[Template:Bracket|<nowiki>{{bracket|text}}</nowiki>]] || [[Template:Pipe|<nowiki>{{pipe}}</nowiki>]] ||colspan="2" | &nbsp;
|}-->

Pages with this error are automatically placed in {{#invoke:cs1 documentation support|help_text_cats|err_bad_paramlink|pages=yes}}.<ref group="lower-alpha" name="categories" /><section end="bad_paramlink_help_text" />