I.e., it's a {{tl}}-style template-link tag that boldfaces the template name, and accepts parameters. It's main use is in distinguishing between multiple templates with similar names, in documentation, talk page discussions, etc.
The rest of the documentation is for {{tlx}}, which works the same way (although it doesn't currently behave sanely when no parameters are given; use {{tlu}} instead).
When you want to indicate setting a value to one or more parameters, you would normally use the equals-sign ("="). This doesn't work here; instead use {{=}}, like so:
For more than ten parameters – with or without equals-signs – instead wrap the entire list of parameters and their values in <nowiki>...</nowiki> tags. When you do, you don't need to replace equals-signs. For instance:
Mnemonically, template link expanded (after template link).
This template allows an example of calling a template, accompanied by one or more parameters, to be displayed without also causing the template to be called.
Up to 20 of the template's parameters (numbered or nowiki-keywords) may be displayed as placeholders, while more than over 20 parameters can be displayed using a coded vertical bar (pipe) symbol, as in |. A keyword parameter can be used with equals code = or {{=}} or in nowiki-text: "<nowiki>size=10</nowiki>" or all parameters as a string in "<nowiki>" tags; see Examples at bottom. For more details, see this talk page. If you use 21 or more parameters, all after the 20th will be replaced with a single |... at the end of the parameter list.
Exceptions
If the intended template lists numerous parameters, then perhaps this template should really not be used, and just hardcode the usage with <code><nowiki>. For example:
If a vertical display, with parameters on their own lines, is desired, this can also be laid out manually in this manner, or more rapidly done with <pre>...</pre>.
Parameters
If the only parameter supplied is {{{1}}}, i.e. a template's name, {{tlx}}'s output is the same as {{tl}} – i.e. a link within braces – but in a monospaced font:
{{tl}} will also not take nor display additional parameters.
Named parameters
|subst=
Setting this parameter to any non-blank value will prefix the string subst: linked to Help:Substitution. This is useful to indicate when a template should be substituted. For example, {{tlx|Welcome|subst=Y}} produces: {{subst:Welcome}}. This is similar to the action of the {{tlxs}} template: {{tlxs|Welcome}} produces: {{subst:welcome}}.
|SISTER=
For an interwiki link to other sister projects, such as: |SISTER=M: (Meta), |SISTER=Q: (WikiQuote), |SISTER=S: (WikiSource), etc, facilitating interwiki template documentation and/or discussion.
|LANG=
For a link to Wikipedias in other languages, such as: |LANG=de: (German), |LANG=sv: (Swedish), etc, facilitating cross-language template documentation and/or discussion.
Documentation
{{Tlx}} is a generalization of {{tl}}, {{tlp}} etc., with output that is arguably more legible. This depends on the browser, but narrow gaps between characters such as "{", "|", "}" and links can be hard to read when not monospaced (and hard to click on; for uses like {{!}}, see {{tlw}}, which makes the click target bigger).
There are up to 10 placeholders for parameters of the specified template.
Examples
Note
At the en.wikipedia and Meta sites, X0, X1, X2, ... X9 are sandbox templates for experimentation on involved templates that need be in template space. An auto-cleansing software facility exists that might be used to duplicate the facility on other sister projects.
This template prefers inline formatting of parameters.
Parameter
Description
Type
Status
Template name
1
Name of the template to link.
Example
Tlx
Template
required
1st parameter
2
no description
String
optional
2nd parameter
3
no description
String
optional
3rd parameter
4
no description
String
optional
4th parameter
5
no description
String
optional
5th parameter
6
no description
String
optional
6th parameter
7
no description
String
optional
7th parameter
8
no description
String
optional
8th parameter
9
no description
String
optional
9th parameter
10
no description
String
optional
10th parameter
11
no description
String
optional
11th parameter
12
no description
String
optional
12th parameter
13
no description
String
optional
13th parameter
14
no description
String
optional
14th parameter
15
no description
String
optional
15th parameter
16
no description
String
optional
16th parameter
17
no description
String
optional
17th parameter
18
no description
String
optional
18th parameter
19
no description
String
optional
19th parameter
20
no description
String
optional
20th parameter
21
no description
String
optional
Show subst:
subst
Set to any value to show "subst:" before the template name
Example
true
Boolean
optional
Language
LANG
The prefix for a link to Wikipedias in other languages.
Example
de:
Line
optional
Sister project
SISTER
The prefix for an interwiki link to other sister projects
Example
M:
Line
optional
See also
{{tlxb}}, a version of {{tlx}} where the template name is shown in bold.
{{tlb}}, a version of {{tl}} where the template name is shown in bold.
{{temt}}, a version of {{tlx}} that handles templates whose names include "Template:" and pages outside the Template: namespace that are treated as templates.
{{para}}, for the presentation of template parameters and values (e.g. |paraname=val, |another=).
{{tnull}}, like {{tlx}} without linking the template.
