created: 20150221105732000 modified: 20150221222352000 tags: [[Macro Syntax]] title: Macro Call Syntax type: text/vnd.tiddlywiki <<.preamble """What follows is a formal presentation of the syntax of the WikiText syntax for macro calls, using [[railroad diagrams|Railroad Diagrams]]. A [[simpler overview|Macro Calls in WikiText]] is also available.""">> <$railroad text=""" "<<" name [: space [:{param-value}] ]">>" """/> <<.place space>> denotes a sequence of [[whitespace characters|Filter Whitespace]]. The [[macro|Macros]]'s <<.place name>> is a sequence of non-whitespace characters other than `(` or `>`. Each individual <<.place param-value>> has the following syntax: <$railroad text=""" [: param-name [:space] ":" [:space] ] value [: space] """/> The <<.place param-name>> is a sequence of letters (`A`--`Z`, `a`--`z`), digits (`0`--`9`), hyphens (`-`) and underscores (`_`). The <<.place value>> is specified as follows: <$railroad text={{$:/editions/tw5.com/railroad/macro-parameter-value}}/>