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Select by category-related criteria (examples) (view source)
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{{DPL
{{tocright}}
The examples on this page, all [[Criteria for page selection|select articles based on CATEGORY]] for output.
==category parameter==
===Single category===
<pre>
{{#dpl:
|category=Countries in North America
}}
</pre>
or
<pre>
<dpl>
category=Countries in North America
</dpl>
</pre>
'''Result:'''<br>
<dpl>
category=Countries in North America
</dpl>
===Logical OR===
Using pipe (or pipe replacement) for logical '''OR''':
<pre>
{{#dpl:
|category=Countries in Africa¦Countries in North America¦Countries in United Kingdom
|namespace=
}}
</pre>
or
<pre>
<dpl>
category=Countries in Africa|Countries in North America|Countries in United Kingdom
namespace=
</dpl>
</pre>
'''Result:'''<br>
<dpl>
category=Countries in Africa|Countries in North America|Countries in United Kingdom
namespace=
</dpl>
===Logical AND with logical OR===
Logical '''OR''' with logical '''AND''' by using a second category statement.
<pre>
{{#dpl:
|category=Countries in North America¦Countries in United Kingdom
|category=Part of NATO
}}</pre>
{| class="wikitable mw-collapsible mw-collapsed"
! Other invocation examples
|-
|
'''Parser function''' invocation <code><nowiki>{{#dpl:}}</nowiki></code> with pipe escaped via <code><nowiki>{{!}}</nowiki></code> [[mw:Help:Magic words#Other|magic word]]:
<pre>
{{#dpl:
|category=Countries in North America{{!}}Countries in United Kingdom
|category=Part of NATO
}}
</pre>
or
Tag/parser extension invocation <code><nowiki><dpl></dpl></nowiki></code> (where regular pipe can be used because there's no pipe to set the ''category'' parameter):
<pre>
<dpl>
category=Countries in North America|Countries in Europe
category=NATO membership debates
</dpl>
</pre>
{{note|Tag/parser extension {{DPL|syntax}} is simpler, but much less flexible than parser function <code><nowiki>{{#dpl:}}</nowiki></code> syntax.}}
|}
'''Result''' (identical output regardless of invocation method):<br>
{{#dpl:
|category=Countries in North America¦Countries in United Kingdom
|category=Part of NATO
}}
===Include direct subcategories===
If you put a <code><nowiki>*</nowiki></code> before the name of a category, DPL will add all DIRECT subcategories of that category to your statement.
Using TWO asterisks ( <code><nowiki>**</nowiki></code> ) will extend the tree search to two levels. This provides some minimal support for hierarchies of categories. The syntax and/or semantics of this feature might be changed in a future version.
<pre>
{{#dpl:
|category=+Countries in Africa¦Countries in Europe
|category=*Part of NATO
|headingmode=ordered
|ordermethod=category,sortkey
}}
</pre>
'''Result:'''<br>
{{#dpl:
|category=+Countries in Europe¦Countries in Africa
|category=*Part of NATO
|headingmode=ordered
}}
===Must be in 2 categories===
To find all articles that are in two category, such as all Country examples and Part of NATO, an example would be:
<pre>
{{#dpl:
|category = Country examples
|category = Part of NATO
}}
</pre>
'''Result:'''<br>
{{#dpl:
|category = Country examples
|category = Part of NATO
}}
===Must be in 1 category and another (one of multiple)===
Or to find all articles that contain one category name, and then another category name from two possible options, such as listing all the chairs that are made of wood as well as all the chairs that are made of metal, would be:
<pre>
{{#dpl:
|category = Country examples
|category = NATO membership debates | Part of NATO
}}
</pre>
'''Result:'''<br>
{{#dpl:
|category = Country examples
|category = NATO membership debates | Part of NATO
}}
==categorymatch parameter==
===Begins with===
Wildcard <code>%</code> at the end means the word must begin with whatever was specified, the ending can be anything.
<pre>
{{#dpl:
|categorymatch=Countries%
|count=3
}}
</pre>
or
<pre>
<dpl>
categorymatch=Countries%
count=3
</dpl>
</pre>
This selects pages that belong to any category name that begins with "Countries" (such as those in [[:Category:Country examples]]), limited to a result count of 3.
'''Result:'''
{{#dpl:
|categorymatch=Countries%
|count=3
}}
===Ends with===
Wildcard <code>%</code> at the beginning means the word must end with whatever was specified, the beginning can be anything.
<pre>
{{#dpl:
|categorymatch=%output pages
|count=4
}}
</pre>
or
<pre>
<dpl>
titlematch=%output pages
</dpl>
</pre>
This selects pages that belong to any category name that ends with "output pages" (such as those pages belonging to one of the categories in [[:Category:Demo output pages]]).
'''Result:'''
{{#dpl:
|categorymatch=%output pages
}}
===Contains===
Using a <code>%</code> (wildcard) '''on either side''' of an {{DPL|categorymatch}} argument, selects pages that belong to a category where the specified characters are found '''anywhere''' in the category name.
<pre>
{{#dpl:
|categorymatch=%demo%
|count=3
}}
</pre>
or
<pre>
<dpl>
categorymatch=%demo%
count=3
</dpl>
</pre>
This selects pages that belong to a category name that contains "demo" such as [[:Category:Miscellaneous demo examples]], though it does not match pages in [[:Category:Demo output pages]] because {{DPL|categorymatch}} is case-sensitive. Results in this example are limited to a count of 3.
'''Result:'''
{{#dpl:
|categorymatch=%demo%
|count=3
}}
===Keeping spaces at beginning or end===
Normally, if a space was in the middle of a {{DPL|categorymatch}} statement it would automatically escape it by inserting a <code>\</code> in front; however, when spaces are used at the beginning or end of a {{DPL|categorymatch}} statement, they must manually be escaped. For example, if we wanted to search for items by <code>% in %</code>, we would need to escape the spaces <code>\ in\ </code> to keep them.
<pre>
{{#dpl:
|category = Country examples
|categorymatch = %\ in\ %
|count = 5
}}
</pre>
or
<pre>
<dpl>
categorymatch = %\ in\ %
category = Country examples
count = 5
</dpl>
</pre>
This selects pages that belong to a category that has <code> in </code> '''anywhere''' in any category name, such as [[:Category:Countries in Africa]], [[:Category:Countries in Europe]], and [[:Category:Countries in North America]], and that are in [[:Category:Country examples]], limited to a {{DPL|count}} of 5 results.
'''Result:'''
{{#dpl:
|category = Country examples
|categorymatch=%\ in\ %
|count=5
}}
===Multiple criteria===
Using <code>%</code> (wildcard) on either side, for letters anywhere in a category name:
<pre>
{{#dpl:
|categorymatch=%ruit%¦%esse%
|count=6
}}
</pre>
or
<pre>
<dpl>
categorymatch=%ruit%¦%esse%
count=6
</dpl>
</pre>
'''Result:'''
{{#dpl:
|categorymatch=%ruit%¦%esser%
|count=6
|order = ascending
}}
This selects pages that belong to a category that has "ruit" or "esser" in the category name, such as [[:Category:Fruit examples]] and [[:Category:Dessert examples]], limited to a {{DPL|count}} of 6 results.
==Other==
{{note|These examples will be moved elsewhere, once their respective pages are created.}}
Sort articles alphabetically, disregarding the namespace in the order (sorting for "Category:NATO membership debates" would sort by the "N" in "NATO" rather than the "C" in "Category".
<pre>
{{#dpl:
|category = Part of NATO
|ordermethod = titlewithoutnamespace
|order = ascending
}}
</pre>
'''Result:'''<br>
{{#dpl:
|category = Part of NATO
|ordermethod = titlewithoutnamespace
|order = ascending
}}
[[Category:Criteria for page selection (examples)]]
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