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TiddlyWiki5/editions/tw5.com/tiddlers/concepts/Pragma.tid
2018-09-28 16:01:32 +01:00

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created: 20150219175930000
modified: 20180928145730028
tags: Concepts
title: Pragma
type: text/vnd.tiddlywiki
A <<.def pragma>> is a special component of WikiText that provides control over the way the remaining text is parsed.
Pragmas occupy lines that start with `\`. They can only appear at the start of the text, but blank lines are allowed between them. If a pragma line appears in the main body of the text, it is treated as if it was ordinary text.
The following pragmas are available:
;`\define`
: for defining a [[macro|Macros]]
;`\rules`
: for adjusting the set of rules used to parse the text
;`\whitespace trim` or `\whitespace notrim`
: <<.from-version "5.1.15">> Control whether whitespace is trimmed from the start and end of text runs (the default is ''notrim''). This setting can be useful when the whitespace generated by linebreaks disturbs formatting
;`\import <filter-expression>`
: <<.from-version "5.1.18">> for importing macro definitions from tiddlers identified by a filter expression