DPL:Manual - DPL parameters: Criteria for page selection

Manual

Criteria for page selection

You can select articles based on
- the category/categories they are assigned to
- the number of categories they are assigned to
- their namespace
- their usage of templates
- their title
- their references to other articles
- their character (#redirect or normal article)
- their revision date

You can restrict the number of articles to a certain limit
- via configuration settings within the DPL2 source
- via a specific parameter for a given invocation of DPL2

You can select a subset from the result list by random

1 Select articles based on CATEGORY
2 Select articles based on NAMESPACES
- 2.1 namespace
- 2.2 notnamespace
3 Select articles based on LINKS
4 Select articles based on the use of TEMPLATES
5 Select articles based on authors / editors
6 Select articles based on TITLE
7 Select articles based on CONTENTS
8 Select articles based on REVISION dates
9 Select articles based on OTHER criteria
10 Restrict the output volume

Select articles based on CATEGORY

This list will output pages that have [[Category:Africa]] but do not have either [[Category:Zimbabwe]] or [[Category:Kenya]] listed.

Notes:

If you use the parser function syntax you will be able to use Magic words like {{CURRENTMONTHNAME}}, {{CURRENTDAY}}, {{CURRENTYEAR}} etc in the category name.

Related DPL extension variables: $wgDPL2MaxCategoryCount, $wgDPL2AllowUnlimitedCategories, $wgDPL2MinCategoryCount.

notcategorymatch

Works like notcategory but based on SQL LIKE

notcategoryregexp

Works like notcategory but based on SQL REGEXP

categoriesminmax

To restrict the search to articles which are assigned to at least [min] and at most to [max] categories.

Syntax:

categoriesminmax=[min],[max]

Example:

<DPL>
  category=Africa
  categoriesminmax=3
</DPL>

The list will only contain articles which belong to category "Africa" and at least to two other categories

<DPL>
  category=Africa
  categoriesminmax=,1
</DPL>

The list will only contain articles which belong to category "Africa" and are not assigned to any other category.

Select articles based on NAMESPACES

namespace

To restrict the articles in the list to only be in one of the given namespaces.

Syntax:

namespace=1st namespace name|2nd namespace name|3rd namespace name|...

The namespace name may be any one, assuming it represents a valid namespace in the system, including custom ones, BUT no pseudo-namespace such as Media, Special which have negative namespace ids. The empty string is the main article namespace (e.g. 'namespace=' for pages in Main ns only, 'namespace=|Help' or 'namespace=Talk|' for Main or Talk ns, 'namespace=User||Category' for User, Main or Category, etc.).

Name spaces are case sensitive namespace=User_talk will work, but namespace=User_Talk will not.

Instead of using the title of a namespace you can also use its numeric ID - although this is not recommended. DPL will always try to interpret the argument as a name first. So, if you create a user namespace with the title "1" (which is possible in principle) DPL will take this namespace if given a "1" as an argument. In this case the "Talk" namespace (which has the numeric id '1') cannot be specified by its number but only by the literal "Talk".

Example 1:

<DPL>
  category=Policy
  namespace=Wikinews|Discussion
</DPL>

This list will output pages that are in the Wikinews or Discussion namespace and belong to [[Category:Policy]].

Example 2 (with magic word):

  {{#dpl: category = Policy | namespace= {{NAMESPACE}} }}

This list will output pages that are in the namespace the current page is in - whatever it is - and belong to [[Category:Policy]].

notnamespace

Much like the notcategory parameter, but for namespaces. Requires that every page listed not be in one of given namespaces.

Syntax:

notnamespace=namespace name

Example 1:

<DPL>
  notnamespace=Wikinews
  notnamespace=Discussion
</DPL>

This list will output pages that are NEITHER in the Wikinews NOR in the Discussion namespace.

Example 2 (with magic word):

  {{#dpl: notnamespace = Wikinews | notnamespace = {{NAMESPACE}} }}

This list will output pages that are NEITHER in the Wikinews NOR in the namespace the current page is in.

Select articles based on LINKS

linksfrom

Selects articles which are referenced from at least one of the specified pages.

Syntax:

linksfrom=full page name|..

The page mentioned in the DPL query can be retrieved via %PAGESEL%.

Example 1:

<DPL>
  category = Poets
  linksfrom  = Dublin|Cork
</DPL>

This list will output pages that are mentioned (with a hyperlink) in article Dublin or Cork in the Main namespace and which belong to category "Poets".

Example 2 (with magic word):

  {{#dpl: category = Poets | linksfrom = {{FULLPAGENAME}} }}

This list will output pages that are in category "Poets" and which are referenced by the current page, whatever it is. Note that normally 'linksfrom' will only show existing pages. With 'openreferences=yes' this can be changed.

Note that the distinct parameter can be used to control the amount of output you get.

openreferences

extends the 'linksfrom' to unresolved references.

Syntax:

openreferences=yes

Example 1:

<DPL>
  linksfrom  = Dublin|Cork
  openreferences=yes
</DPL>

This list will output pages that are mentioned (with a hyperlink) in article Dublin or Cork in the Main namespace, regardless whether these pages exist or not.

Note that the vast majority of DPL parameters depend on the existence of a page. If you set openreferences to 'yes' none of those parameters can be used. Examples for conflicting parameters are all parameters which relate to categories, revisions, authors, redirections and some other parameters.

Note that you must specify ordermethod=none if you want to use openreferences=yes.

notlinksfrom

Selects articles which are NOT referenced from any of the specified pages.

Syntax:

notlinksfrom=full page name|..

Similar to linksfrom, you could use the {{FULLPAGENAME}} Magic Word, and not include any pages linked to from the current page. This, however, will generally result in errors.

linksto

Selects articles which link to at least one of the specified pages.

Syntax:

linksto=full page name|..

The page mentioned in the DPL query can be retrieved via %PAGESEL%.

A %-sign can be used as a wildcard (SQL-LIKE expression).

If you specify more than one linksto condition they will act as a logical AND. In this case the %PAGESEL% variable will point to the FIRST condition.

Example

Parser extension

<DPL>
  category = Poets
  linksto  = Dublin|C%r%
</DPL>

Parser function

{{#dpl: category = Poets | linksto = Dublin{{!}}C%r%}}

This list will output pages that are in category "Poets" and link to a page with title Dublin or Cork (or Cornwall etc.) in the Main namespace (by default). To make the comparison case-insensitive, use the parameter ignorecase. Note the use of {{!}} as a template call to "|" in order for multiple values in parameters when using DPL as a parser function (otherwise DPL would interpret "|Cork" as another parameter, and give an error).

If a page links to Cork and Cornwall it will appear twice in the output. Use %PAGESEL% to see thename of the page it links to.

Example 2 (with magic word)

  {{#dpl: category = Poets | linksto = {{FULLPAGENAME}} }}

This list will output pages that are in category "Poets" and link to the current page, whatever it is.

Note that the distinct parameter can be used to control the amount of output you get.

notlinksto

Selects articles which do NOT link to any of the specified pages.

Syntax:

notlinksto=full page name|..

Example:

<DPL>
  category   = Poets
  notlinksto = London|Paris
</DPL>

This list will output pages that are in category "Poets" and do not have a link pointing to a page with title London or Paris in the Main namespace.

Note:

The implementation of this feature is not very efficient. Use with care and avoid huge result sets.

Note that the distinct parameter can be used to control the amount of output you get.

linkstoexternal

Selects articles which contain an external link that matches a given text pattern.

Syntax:

linkstoexternal=text pattern|..

This command selects pages which contain external http links that match a certain pattern. The pattern is used in SQL LIKE expression, i.e. _ and % are treated as special symbols that match any character respecting a group of arbitrary characters.

The pattern is case-sensitive!

The pattern is matched against the whole URL. Therefore you need to put % around the pattern if you only give part of the string:

 linkstoexternal=%mywebpage%

If you specify more than one linkstoexternal item, a page must match ALL conditions (logical AND).

The URL of the external link can be retrieved via %EXTERNALLINK%.

imageused

Selects articles which use a certain image

Syntax:

imageused=image name|..

Example:

<DPL>
  imageused = My.gif | Your image.png | Image:His.jpg
</DPL>

As you can see the Namespace 'Image' need not be specified.

Note: There is a variable %IMAGESEL% which contains the image name(s) used for selection.

imagecontainer

Select images which are contained in one or more articles

Syntax:

imagecontainer=page name|..

Example:

<DPL>
  imagecontainer = MyPage | YourPage
  escapelinks=false
  openreferences=true
</DPL>

This statement will show all images which are contained in the two articles MyPage and YourPage. Normally we would only get the names of images that really exist. But because we have specified openreferences=true we will also see non-existing images. Normally we would get a list of image names. Setting the parameter escapelinks to false, however, causes that we will see existing images directly. Non existing images will be displayed as red links.

See example.

Select articles based on the use of TEMPLATES

uses

uses	Selects articles which use at least one of the specified templates (wiki syntax: `{{...}}`).

Syntax:

uses=Template:name|Template:.. The "Template" namespace must be specified. You can also specify another namespace if you like.

Example 1:

<DPL>
  uses = Template:Poet|Template:Painter
</DPL>

This list will output pages that use a template called Poet and/or another template called "Painter".

It is not possible to find pages that use 2 templates (e.g. Template:Foo AND Template:Bar).

notuses

Selects articles which do not use any of the specified template.

Syntax:

notuses=Template:name|Template:..

Example 1:

<DPL>
  category = Poet
  notuses = Template:Poet
</DPL>

This list will output pages about poets which do not use the corresponding template.

Caution:

The implementation of this feature is not very efficient. Use with care and avoid huge result sets.

usedby

Selects articles (templates) which are used (included) by a specified page.

Syntax:

usedby=page

Example 1:

<DPL>
  usedby=Main Page
</DPL>

This will create a list of all pages which are included by the main page of your wiki.

Select articles based on authors / editors

createdby

Selects articles which were created by the specified user.

Warning: This keyword can produce very slow and inefficient queries on your MediaWiki system, potentially impacting performance for all users. (See bug report.)

Syntax:

createdby=username

Note (applies for all user related selection criteria):

You can combine user related selections. For example you could search for pages which were not created by user1 but modified by him, or you could search for pages which were created by user1 and lastmodified by user. You can also show several or all versions of such articles by specifiying one or more of the "revision" group of parameters like allrevisionsbefore.
currently there is no mechanism to make a distinction between minor edits and normal modifications

notcreatedby

Selects articles which were NOT created by the specified user.

Warning: This keyword can produce very slow and inefficient queries on your MediaWiki system, potentially impacting performance for all users. (See bug report.)

Syntax:

notcreatedby=username

Note:

To avoid huge result sets this will typically be accompanied by other selection criteria.

modifiedby

Selects articles which were created or at least once modified by the specified user.

Syntax:

modifiedby=username

Note:

modifiedby will always be a superset of createdby as the creation of a page is interpreted as its first modification.

notmodifiedby

Selects articles which were NOT (created or) modified by the specified user.

Syntax:

notmodifiedby=username

Note:

To avoid huge result sets this will typically be accompanied by other selection criteria.

lastmodifiedby

Selects articles where the last modification was done by the specified user.

Syntax:

lastmodifiedby=username

notlastmodifiedby

Selects articles where the last modification was NOT done by the specified user.

Syntax:

notlastmodifiedby=username

Note:

To avoid huge result sets this will typically be accompanied by other selection criteria.

Select articles based on TITLE

There are several possibilities to select articles by their title. When the titles of matching articles are displayed later in the output list their names can be shown in different ways: The namespace may be shown or skipped and even parts of the name can be changed. See shownamespace, replaceintitle, escapelinks and titlemaxlength for details.

title

Select one single page by its (namespace and) title.

Syntax:

title=pagetitle

If you specify a "title", the "mode" will be automatically set to "userformat" which means that you will get no output by default. Specifying an exact "title" makes sense if you want to transclude contents from one specific other page, e.g. the whole text, a chapter, labeled sections or template calls.

Thus DPL may serve as a more flexible alternative to Labeled Section Transclusion.

Examples:

{{#dpl:title=My Page|include=#First Chapter}}
{{#dpl:title=My Page|include={My Template}.dpl|multisecseparators=\n----\n}}

The first example will include the contents of "My Chapter" of an article named "My Page" in the main namespace.

The second example will take all invocations of template "My Template" in article "My Page" and apply "Template:My Template.dpl" instead of "Template:My Template". The output will be separated by horizontal lines.

title<

Restrict the selection to pages with a title less or equal to a given value.

Syntax:

title<=string

The string given need not be a valid page title.

If this parameter is set together with 'ASCENDING' order and a count limit, you will get the pages which are immediately 'below' the given string. This allows efficient scrolling through huge result sets.

For details see Scrolling.

title>

Restrict the selection to pages with a title greater or equal to a given value.

Syntax:

title>=string

The string given need not be a valid page title.

If this parameter is set together with 'ASCENDING' order and a count limit, you will get the pages which are immediately 'above' the given string. This allows efficient scrolling through huge result sets.

For details see Scrolling.

scroll

enable built-in support for scrolling result sets.

Syntax:

scroll=yes

If this command is given, DPL will interpret some special arguments in the URL.

DPL_count       limit number of pages to show
DPL_offset      where to start (n^th page)
DPL_refresh     whether to purge the special DPL cache or not 
DPL_fromTitle   page name to start after (will be passed to title< ) 
DPL_toTitle     page name to end with (will be passed to title> , needed for reverse scroll) 
DPL_findTitle   page name to start with (will be passed to title>= ) 
DPL_scrolldir   direction of scroll (can be 'up' or 'down')

For details see Scrolling.

titlematch

titlematch Select pages with a title matching at least one of the specified patterns. The patterns are used as a LIKE argument in an SQL query. Namespaces are ignored as the namespace parameter can be used to further narrow the selection.

Syntax:

titlematch=pattern|..

Example:

<DPL>
  titlematch=%foo%|bar%
</DPL>

This will output all pages (regardless of namespace) which have a name that contains "foo" somewhere in the title or start with "bar"

Example:

<DPL>
  namespace=
  titlematch=A%
</DPL>

This will output all pages in the main namespace which begin with "A".

The match is case-sensitive, even with respect to the first character; to make it case-insensitive, use the parameter ignorecase. Note that spaces are translated to \_ (escaped underscore) as MediaWiki internally stores names with underscores instead of spaces. Using an underscore in your titlematch argument means 'any single character' in SQL LIKE expressions.

titleregexp

Select pages with a title matching the specified regular expressions. The pattern will be used as a REGEXP argument in a SQL query. Namespaces are ignored as the namespace= parameter can be used to further narrow the selection.

Syntax:

titleregexp=regular expression

Example:

<DPL>
  titleregexp=[0-9]+.*y$
</DPL>

This will output all pages (regardless of namespace) which have a digit in their name and end with a "y". Use the parameter ignorecase to make the comparison case-insensitive.

nottitlematch

Select pages with a title NOT matching any of the specified patterns. The patterns are used as a LIKE argument in a SQL query. Namespaces are ignored as the namespace= parameter can be used to further narrow the selection. Normally you would want to use this selection only in combination with other criteria. Otherwise output could become huge.

Syntax:

nottitlematch=pattern|..

Example:

<DPL>
  nottitlematch=%e%|%u%
</DPL>

This will output all pages (regardless of namespace) which do not contain an "e" or a "u" in their title.

nottitleregexp

Select pages with a title that does NOT match the specified regular expression. The expression will be used as a REGEXP argument in a SQL query. Namespaces are ignored as the namespace= parameter can be used to further narrow the selection. Normally you would want to use this selection only in combination with other criteria. Otherwise output could become huge.

Syntax:

nottitleregexp=regular expression

Select articles based on CONTENTS

includematch

Controls the selection of pages based on contents which shall be included from these pages.

Syntax:

includematch=regexp1,regexp2,..

The idea is that a page will only be selected (and its contents included) if the contents to be included matches a regular expression. In case of (heading based) chapter inclusion and labeled section inclusion the relevant contents of the page must match the pattern; in case of template based matching it is the complete wikitext of the calling code of your template which is tested against your regular expression. Be careful to design your regexp in a proper way so that it can match all syntactical variations and note that we use Perl regular expressions. This means that you must delimit your regexp with two identical characters that are not part of the regexp itself, e.g. with /. Otherwise you will see strange error messages from the php interpreter...

If you are not familiar with regular expressions and/or do not know the specifics of Perl regexp used in PHP, you should definitely have a look into the PHP manual before using includematch.

You may want to match named parameters or unnamed parameters. In the first case you should use something like

 includematch=/\{{!}}\s*myParameter\s*=\s*myPattern/s

to be on the safe side. Thus you can put spaces around the = and use linebreaks in your original article when calling the template - and still the pattern will match. Note that you must use a template to produce a pipe symbol - otherwise the pipe will break the parameter structure of your DPL call.

In case the template expects unnamed parameters you would specify something like

 includematch=/\|\s*myPattern/s

If the parameter is not the last one in your template call you might use

 includematch=/\{{!}}\s*myPattern\s*\|/s

Note that in combination with templates the regexp matching will only work if you produce some output at all via the include statement. So, if you call a dummy parameter only or if you call a phantom template that does not produce any output, you will see no matches. It is, however, sufficient to produce a space character to get output. It is not necesssary to output the parameter which matches your regexp.

See the include parameter. And see Talk:Test_includematch.

Example:

<DPL>
  category  = Africa
  include  = #myChapter,{countryProfile}.dpl
  includematch = ,/Name\s*=\s*[Kk]amerun/s
</DPL>

This will match articles which contain a call to the template "countryProfile" and use the "Name" parameter of that template with an argument that contains "Kamerun" or "kamerun" as a text string. Note that there is no pattern specified for the first element of the include statement. "KAMERUN" would not match; we could use the "i" modifier with the regexp to match without case sensitivity if we wanted so.

includematchparsed

Controls the selection of pages based on (pre-parsed) contents which shall be included from these pages.

works exactly like includematch but the contents will be parsed before it is tested against the regular expression.

includenotmatch

Controls the selection of pages based on contents which shall be included from these pages.

Syntax:

includenotmatch=regexp1,regexp2,..

The idea is that a page will only be selected (and its contents included) if the contents to be included does not match a given regular expression. In case of (heading based) chapter inclusion and labeled section inclusion the relevant contents of the page must not match the pattern; in case of template based matching it is the calling code of your template which must not match the regular expression. Be careful to design your regexp in a proper way so that it covers all syntactical variations. You should use something like

includenotmatch=myParameter\s*=\s*myPattern/s

to be on the safe side. Thus you can put spaces around the '=' and use linebreaks in your original article when calling the template - and still the pattern will do its job.

See the include parameter.

Example:

<DPL>
  category  = Africa
  include  = #myChapter,{countryProfile}.dpl
  includenotmatch = ,/Name\s*=\s*[Kk]amerun/s
</DPL>

This will match articles which contain a call to the template "countryProfile" and use the "Name" parameter of that template with an argument that does not contain "Kamerun" or "kamerun" as a text string. Note that there is no pattern specified for the first element of the include statement. "KAMERUN" would not match; we could use the "i" modifier with the regexp to match without case sensitivity if we wanted so.

includenotmatchparsed

Controls the selection of pages based on (pre-parsed) contents which shall be included from these pages.

works exactly like includenotmatch but the contents will be parsed before it is tested against the regular expression.

Select articles based on REVISION dates

By default DPL uses "Y-m-d H:i:s" to display date and time. Note that MediaWiki stores all dates/times in UTC format. When displaying a time stamp DPL will translate it according to

the timezone preference (difference to UTC/GMT) given by the user in his user settings
if no preference is given and for all anonymous users the local time on the server will be used.

So you will either see a time based on your local time (browser based) or based on the timezone in which the wiki server is running.

The same kind of translation applies to dates you specify when selecting articles by revision date/time.

lastrevisionbefore

shows only articles which existed before the specified date. The date of the last revision

before that date will be shown (and will be available as %REVISION% in mode=userformat).

Syntax:

lastrevisionbefore=dateandoptionaltime

dateandoptionaltime is a numeric string of up to 14 digits, like "200812041300" (4th of Dec, 2008, 13:00). The string may contain separation characters like "2008/12/04--13:00".

Note: if this parameter is used the variable %REVISION% will contain the revision of the selected page(s).

firstrevisionsince

The date of the first revision after the specified date will be shown (and will be available as %REVISION% in mode=userformat).

Syntax:

firstrevisionsince=dateandoptionaltime

dateandoptionaltime is a numeric string of up to 14 digits, like "200812041300" (4th of Dec, 2008, 13:00) The string may contain separation characters like "2008/12/04--13:00".

Note: if this parameter is used the variable %REVISION% will contain the revision of the selected page(s).

allrevisionsbefore

shows all revisions which existed before the specified date. The date of each revision will be shown (and will be available as %REVISION% in mode=userformat).

Syntax:

allrevisionsbefore=dateandoptionaltime

dateandoptionaltime is a numeric string of up to 14 digits, like "200812041300" (4th of Dec, 2008, 13:00) The string may contain separation characters like "2008/12/04--13:00".

Note: if this parameter is used the variable %REVISION% will contain the revision of the selected page(s).

allrevisionssince

shows all revisions which were created after the specified date. The date of each revision will be shown (and will be available as %REVISION% in mode=userformat). If there was no new revision of an existing article after the specified date that article will not appear in the output.

Syntax:

allrevisionssince=dateandoptionaltime

dateandoptionaltime is a numeric string of up to 14 digits, like "200812041300" (4th of Dec, 2008, 13:00) The string may contain separation characters like "2008/12/04--13:00".

Note: if this parameter is used the variable %REVISION% will contain the revision of the selected page(s).

maxrevisions

show a page (or its revisions) only if there do not exist more than a given number of revisions for that page.

Syntax:

maxrevisions=number

number must be greater or equal than 1.

minrevisions

show a page (or its revisions) only if there exist at least a given number of revisions for that page.

Syntax:

minrevisions=number

number must be greater or equal than 1. In practice only values of 2 or greater make sense. Using a value of 2, you could exclude freshly created pages from a result set.

Select articles based on OTHER criteria

articlecategory

select a talk page based on a category to which the corresponding base article (in the default namespace) belongs.

Syntax:

articlecategory= categoryname

If you want to select articles in namespace=Talk you can use this statement to define (in addition) a category for an article with identical name in namespace 0 (default namespace).

includesubpages

includesubpages Controls the inclusion or exclusion of pages which have a '/' in their name. Default is true.

Syntax:

includesubpages=false

As subpages are by default always included, only 'no' or 'false' makes sense as an argument for includesubpages.

redirects

Controls the inclusion or exclusion of redirect pages in the output. By default redirections are NOT shown.

Syntax:

redirects=criteria

criteria can be one of:

exclude — excludes redirect pages from lists — (default)
include — allows redirect pages to appear in lists
only — lists only redirect pages in lists

Example:

<DPL>
  category  = Africa
  redirects = include
</DPL>

The result will consist of content pages and redirect pages tagged with [[Category:Africa]]. Note: this parameter does not show pages that link to the redirect (as Special:Whatlinkshere/DPL:Discussion does); only redirect pages themselves.

minoredits

Control the inclusion or exlusion of minor edits in lists.

Requires: ordermethod=[...]firstedit|lastedit

Example:

minoredits=criteria

criteria can be one of:

exclude — ignore minor edits when sorting lists
include — includes minor edits to sort lists — (default)

Example:

<DPL>
category=Africa
ordermethod=lastedit
minoredits=exclude
</DPL>

This list will order pages tagged with [[Category:Africa]] by lastedit, but minor edits will be ignored in the ordering.

stablepages

Control the inclusion or exclusion of pages which are flagged as 'stable'

Syntax:

stablepages= include | exclude | only

default is include .

Purpose:

This parameter is only useful if your wiki uses Extension:FlaggedRevisions. It allows you to control whether pages flagged as 'stable' will be part of the DPL result or not.

qualitypages

Control the inclusion or exclusion of pages which are flagged as 'quality pages'

Syntax:

qualitypages= include | exclude | only

default is include .

Purpose:

This parameter is only useful if your wiki uses Extension:FlaggedRevisions. It allows you to control whether pages flagged as 'quality pages' will be part of the DPL result or not.

Restrict the output volume

count

Controls the number of results that are shown.

Syntax:

count=n, with n a positive integer

A blank value (count=) for unlimited. It is limited to 500 by default, depending on extension variables: $wgDPL2MaxResultCount, $wgDPL2AllowUnlimitedResults.

Example:

<DPL>
category=Africa
ordermethod=pagetouched
count=2
</DPL>

This list will output the two pages most recently changed that have [[Category:Africa]].

If 'count' is missing it can be set from outside via the URL parameter DPL_count.

scroll

activate result scrolling

Syntax:

scroll=yes

Huge result sets can be split into smaller parts. DPL allows you to fetch parts of a huge result set by setting auxiliary selection criteria ([[title<]], [[title>]]). DPL_Example_027 demonstrates the principle. It uses a scroll helper template which generates links to scroll forward and backward through a long result list. To make this possible it relies on variables which give the name of the first and last result item actually shown. The command scroll=yes is used to fill these variables with proper values and to set the title limits according to URL parameters derived from these variables.

offset

show only a portion of a big result list; typically used in combination with "count="

Syntax:

offset = n with n = number of result lines to skip, (integer), default = 0

Example:

<DPL>
  category=Africa
  offset = 10
  count  =  5
</DPL>

This will show articles #11 .. #15 of category Africa; order is determined by alphabet as we did not give any specific ordermethod.

Note:

You could put a DPL query into a template and make count & offset parameters. Calling this template with different values will allow you to display different portions of the result list.
if you use mode=ordered the numbers will be adjusted to reflect the absolute position of the entries, i.e. in the above example you will see numbers starting from 11.

If 'offset' is missing it can be set from outside via the URL parameter DPL_offset.

randomcount

create the complete result set and then select a subset for display by random.

Syntax:

randomcount=n, with n a positive integer

If randomcount is larger than the number of results, the complete result set will be displayed.

Example:

<DPL>
  category=Africa
  ordermethod=size
  count=20
  randomcount=3
</DPL>

This list will output three random articles from the group of the 20 largest articles on Africa.

randomseed

set an initial value for the random generator

Syntax:

randomseed=n, with n a positive integer

Example:

{{#dpl:
  |category=Africa
  |randomcount=3
  |randomseed={{#time:Ymd}}
}}

This will set the random seed to a new value every day. Using this on your homepage you could present a stable set of random articles for one day and switch to another set every day.

distinct

allow / suppresses duplicates in the output

Syntax:

distinct=true | false | strict

Normally distinct is set to true. This means that a page will occur only once in the output.

In connection with linksto and linksfrom, however, a page can occur more than once in the output. This happens if you specify more than one page for the linksfrom/linksto parameter and the same page contains links to more than one of them (linksto) or if the same page is referenced by more than one of them (linksfrom). If you want see a page only once also in these cases, use distinct=strict.

On the other hand, if you wish to see mutiple result entries you should switch this to false. This may make sense in combination with linksto or linksfrom if you want to see how many links from one document to another document exist.

ignorecase

make comparisons insensitive to case

Syntax:

ignorecase=true

The default is case sensitivity. So only true makes sense as an argument.

The parameter has an effect on linksto, uses, titlematch, titleregexp and their not-equivalents.

For case-insensitivity in ordering result sets see ordercollation.

skipthispage

include the page containing the DPL query into the result set

Syntax:

skipthispage=no

The default is yes, i.e. the page where your DPL query stands will never show up in the result set. Setting this parameter to 'no' may lead to runtime errors which are hard to track down. You should only use that parameter if your query is straight forward in its structure and you need the current page to show up in the result (if it matches the selction criteria).

DPL:Manual - DPL parameters: Criteria for page selection

Contents

Select articles based on CATEGORY

category

categorymatch

categoryregexp

notcategory

notcategorymatch

notcategoryregexp

categoriesminmax

Select articles based on NAMESPACES

namespace

notnamespace

Select articles based on LINKS

linksfrom

openreferences

notlinksfrom

linksto

notlinksto

linkstoexternal

imageused

imagecontainer

Select articles based on the use of TEMPLATES

uses

notuses

usedby

Select articles based on authors / editors

createdby

notcreatedby

modifiedby

notmodifiedby

lastmodifiedby

notlastmodifiedby

Select articles based on TITLE

title

title<

title>

scroll

titlematch

titleregexp

nottitlematch

nottitleregexp

Select articles based on CONTENTS

includematch

includematchparsed

includenotmatch

includenotmatchparsed

Select articles based on REVISION dates

lastrevisionbefore

firstrevisionsince

allrevisionsbefore

allrevisionssince

maxrevisions

minrevisions

Select articles based on OTHER criteria

articlecategory

includesubpages

redirects

minoredits

stablepages

qualitypages

Restrict the output volume

count

scroll

offset

randomcount

randomseed

distinct

ignorecase

skipthispage

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