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-[[!meta robots="noindex, follow"]]
-Preprocessor directives are similar to a [[WikiLink]] in form, except they
-begin with `!` and may contain parameters. The general form is:
-
- \[[!directive param="value" param="value"]]
-
-This gets expanded before the rest of the page is processed, and can be used
-to transform the page in various ways.
-
-The quotes around values can be omitted if the value is a simple word.
-Also, some directives may use parameters without values, for example:
-
- \[[!tag foo]]
-
-A preprocessor directive does not need to all be on one line, it can be
-wrapped to multiple lines if you like:
-
- \[[!directive foo="baldersnatch"
- bar="supercalifragalisticexpealadocious" baz=11]]
-
-Also, multiple lines of *quoted* text can be used for a value.
-To allow quote marks inside the quoted text, delimit the block
-of text with triple-quotes:
-
- \[[!directive text="""
- 1. "foo"
- 2. "bar"
- 3. "baz"
- """]]
-
-ikiwiki also has an older syntax for preprocessor directives, which requires a
-space in directives to distinguish them from [[wikilinks|wikilink]]. This
-syntax has several disadvantages: it requires a space after directives with no
-parameters (such as `\[[pagecount ]]`), and it prohibits spaces in
-[[wikilinks|wikilink]]. ikiwiki now provides the `!`-prefixed syntax shown
-above as the preferred alternative. However, ikiwiki still supports wikis
-using the older syntax, if the `prefix_directives` option is not enabled.
-For backward compatibility with existing wikis, this option currently
-defaults to off, so ikiwiki supports the old syntax.