Stampa:Excerpt

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Module:Excerpt

This template is used for reusing parts of pages in other pages. This practice has various advantages and disadvantages.

This template extends the capabilities of the built-in normal transclusion and labeled section transclusion.

Usage

{{Excerpt|Page title}} — Transclude the lead section (example)
{{Excerpt|Page title|Section title}} — Transclude a specific section, excluding any subsections (example)

Parameters

There is one required parameter, and numerous optional ones for configuring the excerpt:

Summary

Source identification

|1= – Name of the article or page to transclude. Required. Aliases: |article= or |page=.
|2= – Name of the section or tag to transclude. Optional; if omitted, transcludes the lead section (content above the first section header). Aliases: |section= or |fragment=.

Transclusion config

Transcludable content is defined as one of several element types: Stampa:Pval, Stampa:Pval, Stampa:Pval, Stampa:Pval, Stampa:Pval, Stampa:Pval, or Stampa:Pval. Config parameters specify which element type to transclude, and in some cases, how many and which items of that type to transclude. All config parameters are optional; if omitted, all items of all element types are transcluded from the source page identified by the two unnamed parameters. Some element types support conditional item transclusion by specifying an item number range (1-3) or comma series (1, 2, 5); these types include: files, lists, paragraphs, and tables.

There are ten optional transclusion configuration parameters:

|only= – Element types to transclude. Values: Stampa:Pval, Stampa:Pval, Stampa:Pval, Stampa:Pval, Stampa:Pval. Default: all element types.
|files= – Files to transclude. Default: all files. Same basic syntax as |paragraphs=, but see Stampa:Excerpt § Shënime.
- |onlyfreefiles=no – Enables transclusion of non-free files. Default: exclude non-free content.
|links=no – Unlink all wikilinks and render as plain text.
|lists= – Lists (bulleted, numbered) to transclude. Default: all lists. Same syntax as for |paragraphs=.
|paragraphs= – Paragraphs to transclude. Default: all paragraphs.
|references=no – Exclude all references between <ref>...</ref> tags.
|subsections=yes – Include subsections of the transcluded section. Default: only content above the first subsection header.
|tables= – Tables to transclude. Default: all tables. Same basic syntax as |paragraphs=, but see Stampa:Excerpt § Shënime.
|templates= – Templates to transclude. By default all templates are transcluded except those blacklisted at Module:Excerpt/config. Using a hyphen (minus sign) before a comma-delimited list of templates adds those templates to the blacklist.

Style and extra features

These optional parameters alter the way transcluded items are displayed:

|bold=yes – Preserve bold text.
|briefdates=yes – Abbreviate birth and death information to (YYYY-YYYY) format
|displaytitle= – Change the text of the link in the hatnote. For example, add italics, subscripts, etc.
|hat=no – Hide the hatnote "This section is an excerpt from..."
|inline=yes – Remove the hatnote and <div> tags around the excerpt, to use it inside other text.
|quote=yes – Wrap the excerpt with <blockquote> tags.
|this= – Change the initial text of the hatnote. For example, if the transcluded content is a gallery, you can set |this=This gallery is so that the hatnote reads "This gallery is an excerpt from..."

Details

|1= or |article= or |page=
By default the lead section is transcluded (example). If the page contains an infobox, the image and caption of the infobox will be transcluded (unless |files=0 is set). Also, templates listed at Module:Excerpt/config will not be transcluded (unless requested explicitly with |templates=, see below).
|2= or |section= or |fragment=
Name of the section or tag to transclude (example) or of the <section> tag to transclude (example). In the case of a section tag, must be marked with <section begin=Name of the fragment/> and <section end=Name of the fragment/> in the transcluded page. Notice that this template provides other ways of targeting specific fragments of a page without having to resort to section tags.
|only=
The element type to transclude, excluding all other types. By default all element types are transcluded. Param |only= is an exclusionary param, and excludes all other types of elements, except the one you name, so that for example, specifying |only=paragraphs excludes all lists, tables, templates, and so on. Param values can be in the singular (e.g., |only=paragraph) or plural (e.g., |only=paragraphs) and mean different things: in the singular, only the first item of that element type is transcluded; in the plural, all items are.
- |only=file – Transclude only the first file (but no lists, paragraphs, tables, etc.)
- |only=files – Transclude all files (but nothing else)
- |only=list – Transclude only the first list, exclude all other element types
- |only=lists – Transclude all lists (but nothing else)
- |only=table – Transclude only the first table, exclude all other element types
- |only=tables – Transclude all tables (but nothing else) (example)
- |only=template – Transclude only the first template (excluding templates blacklisted at Module:Excerpt/config, as well as all other element types)
- |only=templates – Transclude all templates (excluding blacklisted templates), (but nothing else)
- |only=paragraph – Transclude only the first paragraph, exclude all other element types
- |only=paragraphs – Transclude all paragraphs (but nothing else)
|files=
An element item param, defining which files to transclude. Default: all files.
- |files=A.jpg – Transclude the file named 'A.jpg'
- |files=A.jpg, B.png, C.gif – Transclude the files named 'A.jpg', 'B.png' and 'C.gif'
- |files=. %.png – Transclude all PNG files
- |files=-A.jpg – Transclude all files except the one named 'A.jpg'
- |files=-A.jpg, B.png, C.gif – Transclude all files except the ones named 'A.jpg', 'B.png' and 'C.gif'
- |files=-. %.png – Transclude all non-PNG files
|paragraphs=
An element item param, defining which paragraphs to transclude. By default all paragraphs are transcluded.
- |paragraphs=0 – Transclude no paragraphs
- |paragraphs=1 – Transclude the first paragraph
- |paragraphs=2 – Transclude the second paragraph
- |paragraphs=1,3 – Transclude the first and third paragraphs
- |paragraphs=1-3 – Transclude the first, second and third paragraphs
- |paragraphs=1-3,5 – Transclude the first, second, third and fifth paragraphs
- |paragraphs=-1 – Transclude all paragraphs except the first
- |paragraphs=-2 – Transclude all paragraphs except the second
- |paragraphs=-1,3 – Transclude all paragraphs except the first and third
- |paragraphs=-1-3 – Transclude all paragraphs except the first, second and third
- |paragraphs=-1-3,5 – Transclude all paragraphs except the first, second, third and fifth
|subsections=yes
An element item param, defining which subsections of the source to transclude. Default: only the portion of the source lying above the first subsection header. Notice that if the transclusion is done from a section level 3 in the transcluding page, and the transcluded subsections are also level 3, then transcluded subsections will show with the same hierarchy as the transcluding section, which may not be the desired outcome, so use with caution.
|tables=
An element item param, defining which tables to transclude. Default: all tables. Same syntax as when transcluding paragraphs, but also:
- |tables=Stats2020 – Transclude the table with id 'Stats2020'
- |tables=Stats2020, Stats2019, Stats2018 – Transclude the tables with ids 'Stats2020', 'Stats2019' and 'Stats2018'
- |tables=-Stats2020 – Transclude all tables except the one with id 'Stats2020'
- |tables=-Stats2020, Stats2019, Stats2018 – Transclude all tables except the ones with ids 'Stats2020', 'Stats2019' and 'Stats2018'
|templates=
An element item param, defining which templates to transclude. Default: all templates except those blacklisted at Module:Excerpt/config. Using a hyphen (minus sign) before a comma-delimited list of templates excludes those templates from transclusion.
- |templates=-Ocean – Add the template 'Ocean' to the blacklist
- |templates=-Ocean, Nature – Add the templates 'Ocean' and 'Nature' to the blacklist
- |templates=Infobox person – Ignore the blacklist and transclude the template 'Infobox person'
- |templates=Infobox person, Ocean – Ignore the blacklist and transclude the templates 'Infobox person' and 'Ocean'
- |templates=.* – Ignore the blacklist and transclude all templates

Tips and how-to

Compared to #section

For simple cases of transcluding sections of articles, the Stampa:Pf, Stampa:Pf, and Stampa:Pf (abbreviated Stampa:Pf, Stampa:Pf, and Stampa:Pf)) parser functions can be used instead of this template. Stampa:Pf will transclude the section of "article" with the header "fragmentname", and Stampa:Pf will transclude the lead section of "article". Excerpting only specific paragraphs can be done by marking up the source article with <section begin=fragmentname/>...<section end=fragmentname/> tags and using Stampa:Pf to transclude those fragments, which is equivalent to using the |fragment=fragmentname parameter with this template. Stampa:Pf can also be used to transclude everything but those fragments.

The text will not be trimmed of excess whitespace, there will not be a header (equivalent to |hat=no, and all files, templates, tables, references, and subsections will be included unless the source article is marked up with <section begin=fragmentname/>...<section end=fragmentname/>, <noinclude>...</noinclude>, or <onlyinclude>...</onlyinclude> tags. Self links will appear in bold.

Differing citation styles

It can happen that the source you want to excerpt contains footnotes in a different citation style than your article, but the guideline on citing sources calls for preserving a uniform citation style in the article you are editing. Sometimes, this can be reconciled using a combination of the params |references=no and |inline=yes.

If the source you want to excerpt has multiple ref-tags interspersed throughout the source, and they need to be kept that way in order to provide full verifiability, then this source might not be a good candidate for transclusion via the {{excerpt}} template, and copying the content from the source into the article might be a better choice.

However, if the source page you want to excerpt has references mostly or all at the end of the text, or if they can be legitimately moved to the end without adversely affecting verifiability, then you can do it, using |references=no to strip the ref-tags from the transcluded content, and |inline=yes to define the excerpt as an inline display element in order to Stampa:Excerpt § Shënime, and appending a manual reference in the correct style, just after the excerpt, with no intervening line breaks, white space, or other characters.

Excerpt trees

When a very general article uses excerpts from more specific articles, which in turn use excerpts from even more specific articles, then a tree structure emerges, called an "Excerpt tree".

Here you can navigate the main excerpt trees on the English Wikipedia. It's useful for editors interested in expanding or improving them. To navigate the trees, click the following button^(S):

See the excerpt trees

Refinement using inclusion control

Sometimes, a passage will almost fit for a transclusion, but not quite. In these cases, you can edit the source page to add <noinclude>...</noinclude> tags around content you don't want in the excerpt and <includeonly>...</includeonly> tags around content you want only in the excerpt.

For instance, the page COVID-19 misinformation begins with "The COVID-19 pandemic has resulted in misinformation...". However, when excerpting this lead to the misinformation section of COVID-19 pandemic, we don't need to specify which pandemic we're referring to. Therefore, the code The <noinclude>[[COVID-19 pandemic]]</noinclude><includeonly>pandemic</includeonly> has resulted in [[misinformation]] can be used at the misinformation page, so that it will appear at the pandemic page as "The pandemic has resulted in misinformation...".

For pages with a high volume of edits, it may be a good idea to leave a hidden comment explaining why the tags are there, so that no one will be tempted to remove them, like so: The <noinclude>[[COVID-19 pandemic]]</noinclude><includeonly>pandemic</includeonly> has resulted in [[misinformation]]

Please note that when the </noinclude> tag is wrapped into a new line, a character next to it would be interpreted as a line beginning. This can lead to some formatting problems. For example, when a </noinclude> at line beginning is succeeded by a whitespace character, the page engine would translate this as a leading space that renders the subsequent paragraph in code block and monospaced font with preserved formatting. For this reason, no spaces should separate the </noinclude> tag from the text it precedes.

Replacing summary section with excerpt of child article

How to replace a section with an excerpt.

A section is often a summary in a parent article of a more detailed page about a subtopic located in a child page; these are generally linked with Template:Main in the parent. Sometimes it's convenient to replace the content of such a summary section in the parent with an excerpt of the child page lead (after merging any valuable content of the section into the child page). In such cases, an efficient way to proceed is:

Open the parent section for editing in one tab, and the child article in another.
Copy the text of the parent section and append it to the lead section of the child page.
Consolidate and adjust the combined lead using common sense.
Save the changes in the child article with an edit summary like: "Copied content from [[Page]]. See that article's history for attribution."
Back in the parent page section, delete all content except the section header and replace it with an excerpt of the child page.
Save the changes in the section; proposed edit summary: "Moved section content to [[Child page title]] and replaced with excerpt."

Suppress line breaks between paragraphs

If you want to merge two excerpted paragraphs from a source into one longer one in your article, use two excerpts instead of one, and change the display mode to inline. So, for example, instead of this :

{{excerpt|Ocean color|paragraphs=2-3|file=no}} // (example taken from Ocean#Color)

you could code:

{{excerpt|Ocean color|paragraphs=2|file=no|inline=yes}}

{{excerpt|Ocean color|paragraphs=3|file=no|inline=yes}}

and this will remove the line break between the two paragraphs, so they will render as one paragraph.

By default, an {{excerpt}} generates an HTML div-tag, which is a block-level display element, so contiguous excerpts are normally separate block elements with line breaks between them. This can be overridden through use of param |inline=yes, which suppresses the div-tag, and results in an inline display element instead. In this case, just as with running text on adjacent lines of wikicode, no line break is generated between them. This technique can also be adapted to change citation style or use different references.

Advantages and disadvantages

The use of {{Excerpt}} has the following advantages:

Reduces maintenance by avoiding duplicate content that must be updated multiple times
Improves content quality by encouraging editors to merge related content, rather than having multiple versions in various stages of development (see #Replacing summary section with excerpt of child article)
Fosters collaboration by channeling contributors into one place, rather than working in parallel
Promotes rapid development of articles, especially those written in summary style

It also has the following disadvantages:

Impediment to editing as you have to go to the sub article to make changes to the main article (though excerpts include a hatnote with an [edit] button to edit the excerpted article in one click)
Reduces accuracy as an excerpt of one article is not always a perfect fit into a new article (but see #Refinement using inclusion control)
Decreases visibility as changes to the sub article will not appear on the watchlist of editors of the main article (see phab:T55525)
Risk of linkrot as pages or sections are blanked, moved, or deleted; this may result in the appearance of § error messages on the page (but all broken excerpts are automatically tracked at Category:Articles with broken excerpts and regularly fixed).
Duplicated, confusing references since references are pulled from the source article and the destination article may already have the reference.

Error messages

If an error is detected, an error message will appear in the article in place of the expected transcluded content:

No page given – No page was passed to the template
Title X is not valid – The title passed is not valid (contains forbidden characters such as < or >)
Page X not found – The page passed does not exist, or the page is a redirect and the target page was not found
Lead section is empty – The page exists, but cannot excerpt from non-existent lead
Section X not found – The given section does not exist. This may occur if the source page section is removed or renamed. To help mitigate this, see MOS:BROKENSECTIONLINKS.
Section X is empty – The given section exists, but is empty

Template data

This template is used for transcluding part of an article into another article.

Template parameters[Edit template data]
Parameter		Description	Type	Status
Article	`1` `article` `page`	Name of the article or page to transclude Example Science	Page name	required
Section	`2` `section` `fragment`	Name of the section or <section> tag to transclude Example History	String	optional
Only	`only`	Transclude only this kind of element Example table	String	optional
Paragraphs	`paragraphs` `paragraph`	Paragraphs to transclude Example 1-3,5	String	optional
Files	`files` `file`	Files to transclude Default 1 Example 1-3,5	String	optional
Tables	`tables` `table`	Tables to transclude Example Stats2020	String	optional
Lists	`lists` `list`	Lists to transclude Example 1	String	optional
Templates	`templates` `template`	Templates to transclude Example Infobox person	String	optional
References	`references`	Whether to transclude the references Example no	Boolean	optional
Subsections	`subsections`	Whether to transclude the subsections of the requested section Example yes	Boolean	optional
Hatnote	`hat`	Whether to include the hatnote Default yes Example no	Boolean	optional
Bold	`bold`	Whether to preserve bold text Default yes Example no	Boolean	optional
Wikilinks	`links`	Whether to preserve wikilinks Default yes Example no	Boolean	optional
Quote	`quote`	Wraps the excerpt in <blockquote> tags Default no Example yes	Boolean	optional
This	`this`	Change the initial text of the hatnote Example This gallery is	String	optional
Display title	`displaytitle`	Change the text of the link in the hatnote	String	optional
Inline	`inline`	Remove the hatnote and <div> tags around the excerpt, to use it inside other text Default no Example yes	Boolean	optional
Only free files	`onlyfreefiles`	Enable transclusion of non-free files Default no Example yes	Boolean	optional
Brief dates	`briefdates`	Abbreviate birth and death information to (YYYY-YYYY) format Default no Example yes	Boolean	optional
Class	`class`	Additional CSS class Example noprint	String	optional

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