Editing Help:CS1 errors (section)

==<span id="missing_title">Missing or empty |title= </span>==
There are two slightly different error conditions that can arise when [[Help:Citation Style 1|CS1 citations]] lack appropriate titles. In each case, CS1 reports this error message. The necessary resolution may vary depending on the cause of the error. The error message links to the appropriate description below.

===<span id="bare_url_missing_title">Bare URL without a title</span>===
<section begin="bare_url_missing_title_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_bare_url_missing_title|$1=<code class="cs1-code">{{pipe}}&lt;param>=</code>}}

All {{cs1}} and {{cs2}} templates report this error when one of the [[URL]]-containing parameters cannot be paired with an associated title. This error may also occur when {{para|title}} cannot be linked with {{para|url}} because the citation also contains a conflicting {{para|title-link}} parameter.

{|class="wikitable"
|+ URL-containing parameters and associated title parameters
|-
! URL parameters
! Title parameters
|-
| {{para|archive-url}}
| {{para|title}}
|-
| {{para|article-url}}
| {{para|article}}, {{para|chapter}}, {{para|contribution}}, {{para|entry}}, {{para|section}}
|-
| {{para|chapter-url}}
| {{para|chapter}}, {{para|article}}, {{para|contribution}}, {{para|entry}}, {{para|section}}
|-
| {{para|conference-url}}
| {{para|conference}}, {{para|event}}
|-
| {{para|contribution-url}}
| {{para|contribution}}, {{para|chapter}}, {{para|article}}, {{para|entry}}, {{para|section}}
|-
| {{para|entry-url}}
| {{para|entry}}, {{para|chapter}}, {{para|article}}, {{para|contribution}}, {{para|section}}
|-
| {{para|event-url}}
| {{para|event}}, {{para|conference}}
<!-- |-
| {{para|lay-url}}
| &nbsp;&nbsp;({{para|lay-source}}) -->
|-
| {{para|map-url}}
| {{para|map}}
|-
| {{para|section-url}}
| {{para|section}}, {{para|chapter}}, {{para|article}}, {{para|contribution}}, {{para|entry}}
|-
| {{para|transcript-url}}
| {{para|transcript}}
|-
| {{para|url}}
| {{para|title}}
|}

A unique case exists for {{tl|cite journal}}: if {{para|pmc}} or {{para|doi}} has a value, {{para|url}} is omitted or empty, and {{para|title-link}} does not point to an article, then {{para|title}} is automatically linked with the same URL as the PMC or DOI. This default behaviour can be overridden using {{para|title-link|none/pmc/doi}}.

Because URLs are ugly and generally uninformative, it is expected that editors should provide a meaningful title for each URL. In most cases this can be accomplished by using the {{para|title}} parameter.

To resolve this error, provide an appropriate title for the URL-containing parameter. In the case where {{para|url}} and {{para|title-link}} are contending for {{para|title}} you must choose which one to keep. Consider moving {{para|url}} or {{para|title-link}} to a more suitable parameter.

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

===<span id="citation_missing_title">Citation without a title of any form</span>===
<section begin="citation_missing_title_help_text" />{{help desk}}{{plainlist|
*{{#invoke:Cs1 documentation support|help_text_error_messages|err_citation_missing_title|$1=title}}
*{{#invoke:Cs1 documentation support|help_text_error_messages|err_citation_missing_title|$1=series}}}}

This error occurs for {{cs1}} and {{cs2}} templates when all of {{para|title}}, {{para|trans-title}}, and {{para|script-title}} are omitted or left blank.  At least one of these title parameters must be provided for each citation.

{{tlx|cite episode}} will show this error if {{para|series}} is omitted or left blank (even if a {{para|title}} is provided).

{{tlx|cite encyclopedia}} will show this error if {{para|encyclopedia}} has a value but {{para|entry}} (or another {{para|chapter}} alias) is omitted or left blank.

Sometimes this error occurs because an editor has used a CS1|2 citation as a [[Help:Shortened footnotes|shortened footnote]] when {{tlx|sfn}} or one of the {{tlx|harv}} family of templates would have been more appropriate. This error also occurs when an editor used {{tlx|citation}} but intended to use {{tlx|citation needed}}.

To resolve this error, provide a value for {{para|title}}, {{para|trans-title}}, and/or {{para|script-title}} or replace the CS1|2 template with a more appropriate template. If you are listing a periodical or an issue of a periodical in a bibliography rather than within {{tag|ref}} tags, {{tlx|List journal}} may be more appropriate.

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