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* Improve Filter Syntax documentaion / navigation * update links and missing diagrams * rename legacy prefix to shortcut prefix * Update editions/tw5.com/tiddlers/filters/Filter Operators.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/And Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/Sort Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/Sort Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/Sort Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/Cascade Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/And Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * add most changes a suggested by yaisog * fix copy / paste from-version * replace operand with parameter in the docs * fix typo * fix typos and improve railroad diagrams consistency * move "new from version" info for filter run prefixes below the table * fix typo transclusion and substitution * Move Filters tiddler to the top level in the TOC * wip-breadcrumbs * breadcrumbs & breadcrumbsList macro final * remove files that do not belong to this PR * restore release banner * add simple / story mode to breadcrumbs * .breadcrumbs macro update comments * new breadcrumbs CSS, woks with small screens * make CSS configurable using hidden-settings * improve CSS fro small screens * remove the initial: recursiveParentTag macro * improve location info for breadcrumbs nav. add "alt-text" for Edge ::after element * breadcrumbs add mode=field * bc add initial docs * breadcrumbsField will also respect the story ordering * add configurable global filterMode setting * improve arrow CSS for browser zooming * add bc links use bc-caption if caption field is non-empty * breadcrumbs improve comments * breadcrumbs aria-lable uses caption if there is one * breadcrumbs improve documentation * breadcrumbs improve docs for sort param * fix showArrows docs * remove .bc-link aria-label .. it's not needed if caption is resolved properly * use subfilter instead of enlist to evaluate the "excluded" variable. Be consistent with toc-macros * remove breadcrumbs macros - they have their own PR now * resolve conflict * add back doc-macros tiddler * integrate :then filter run prefix * remove .breadcrumbs macros and their config tiddlers * fix typos as requested --------- Co-authored-by: yaisog <m@rcuswinter.de>
61 lines
2.2 KiB
Plaintext
61 lines
2.2 KiB
Plaintext
created: 20141018090608643
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modified: 20231030124224424
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tags: WikiText
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title: Transclusion and Substitution
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type: text/vnd.tiddlywiki
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The power of WikiText comes from the ability to use the content of one tiddler inside another one. This ability takes several different forms that can easily be confused.
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The main distinction is between a transclusion and a textual substitution:
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* A transclusion is replaced dynamically with the value of either:
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** a tiddler field
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** a variable
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* Textual substitutions are performed on the text of macro definitions before they are used
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! Tiddler Field Transclusion
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[[Transclusion in WikiText]] describes the basics of transclusion. For example:
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```
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{{MyTiddler}}
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```
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As described in [[HTML in WikiText]], you can also transclude tiddler field values as attributes of HTML elements and widgets. For example:
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```
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<$text text={{MyTiddler}}/>
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```
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As described in [[Introduction to filter notation]], you can also transclude tiddler field values using the [[filter syntax|Filter Syntax]]. For example:
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```
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{{{ [tag{TiddlerContainingMyTag}] }}}
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```
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! Variable/Macro Transclusion
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Variables that were defined with parameter or variable substitution are referred to as "macros". The value of a variable/macro can be transcluded with the syntax:
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```
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<<myMacro param:"Value of parameter">>
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```
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As described in [[HTML in WikiText]], you can also transclude a variable as the value of an attribute of HTML elements and widgets. For example:
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```
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<$text text=<<myMacro>>/>
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```
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As described in [[Introduction to filter notation]], you can also transclude a variable as the value of a filter parameter using the [[filter syntax|Filter Syntax]]. For example:
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```
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{{{ [tag<myMacro>] }}}
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```
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! Textual Substitution
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Textual substitution occurs when the value of a macro/variable is used. It is described in [[Substituted Attribute Values]] and [[substitute Operator]]
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The key difference between substitution and transclusion is that substitution occurs before WikiText parsing. This means that you can use substitution to build ~WikiText constructions. Transclusions are processed independently, and cannot be combined with adjacent text to define ~WikiText constructions.
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