[module myModule('http://www.eclipse.org/emf/2002/Ecore')/]

[comment @main /]
[template public myTemplate(myParam : ecore::EPackage)]
  [file (myParam.name + '.txt', overwrite)]
    first line
    BEFORE_TEXT [if (myParam.name.startsWith('a'))][myParam.name/]
                [/if] AFTER_TEXT
    last line
  [/file]
[/template]