Editing Help:Transclusion (section)

===Standard section transclusion===
{{notice|text='''This method may cause line break insertion:''' Standard section transclusion may introduce a leading or trailing [[Line break (computing)|line break]] or newline, depending on the markup in the source and target pages. To prevent this, [[Wikipedia:Wrapper templates|wrap]] the transclusion code in a {{tlc|trim}} template. See [[#prevent line break insertion|examples below]].}}
Standard section transclusion uses <syntaxhighlight lang="wikitext" inline>{{#section-h:PAGENAME|SECTIONNAME}}</syntaxhighlight>. One can easily transclude the content within a section from one page to another using the ubiquitous headline-based [[Help:Section|section headers]] used throughout Wikipedia. To transclude the [[Wikipedia:Lead|lead]] section of an article with this method, one can use {{nowrap|<syntaxhighlight lang="wikitext" inline>{{#section-h:PAGENAME}}</syntaxhighlight>}}. This method is simpler than other selective transclusion methods, which require special [[Wikipedia:Markup|markup]] in the source article or page to specify what content should be included or excluded.

{{anchor|prevent line break insertion}}Standard section transclusion may introduce a leading or trailing [[Line break (computing)|line break]] or newline, depending on the markup in the source and target pages. To prevent this, [[Wikipedia:Wrapper templates|wrap]] the transclusion code in a {{tlx|trim}} template. For example:
* To transclude the section of an article: <syntaxhighlight lang="wikitext" inline>{{trim|{{#section-h:PAGENAME|SECTIONNAME}}}}</syntaxhighlight>
* To transclude the lead of an article: <syntaxhighlight lang="wikitext" inline>{{trim|{{#section-h:PAGENAME}}}}</syntaxhighlight>
<!-- This warrants expansion (better formatting, examples), but I'm creating the section for now - to see what the initial feeback is. -Elvey)-->

====Hatnote on the target page====
To indicate on the {{em|target page}} where selectively transcluded content originates (its source), a {{tlx|Transcluded section}} [[Wikipedia:Hatnote|hatnote]] must be placed at the top of the corresponding section in the {{em|target page}} where the content is being transcluded {{em|to}}.{{refn|group=lower-alpha|No hatnote should be placed on the {{em|source page}}, in other words no hatnote is needed on the page being transcluded {{em|from}}, as readers do not need to know where else the content appears.}}{{refn|group=lower-alpha|That is the hatnote should be placed below the header but above the content, per [[MOS:Layout]].}} Use either of the following, depending on whether the transcluded content is the entire section or only part of it:
* If an entire section in the target page is transcluded the source: <syntaxhighlight lang="wikitext" inline>{{transcluded section|source=PAGENAME#SECTION}}</syntaxhighlight>, which renders as:
:{{transcluded section|source=PAGENAME#SECTION}}
* If only part of a section in the target page is transcluded the source, specify {{para|part|yes}}: <syntaxhighlight lang="wikitext" inline>{{transcluded section|source=PAGENAME#SECTION|part=yes}}</syntaxhighlight>, which renders as:
:{{transcluded section|source=PAGENAME#SECTION|part=yes}}

====Hidden comment on the source page====

It is recommended to include a [[Wikipedia:Manual of Style/Hidden text|hidden comment]] at the beginning of the transcluded section in the {{em|source page}}. This comment informs editors that the content is being used elsewhere and serves as a reminder to consider the broader audience when modifying the wording. Additionally, it helps maintain the integrity of the transcluded material on the target page. For example (replace {{mono|<nowiki>[[PAGENAME#SECTION]]</nowiki>}} with the name of the target page):

{{Talk quote block minimalist|{{Example HTML comment|The content of this section is transcluded to <syntaxhighlight lang="wikitext" inline>[[PAGENAME#SECTION]]</syntaxhighlight>. Please be aware that changes made to the original source here will affect the transcluded version on the target page mentioned.}}}}

'''No hatnote should be placed on the {{em|source page}}''', in other words no hatnote is needed on the page being transcluded {{em|from}}, as readers do not need to know where else the content appears.