In semiotic analysis, an open text is a text that allows multiple or mediated interpretation by the readers. In contrast, a closed text leads the reader to one intended interpretation.
The concept of the open text comes from Umberto Eco's collection of essays The Role of the Reader[1], but it is also derivative of Roland Barthes's distinction between 'readerly' (lisible) and 'writerly' (scriptible) texts as set out in his 1968 essay, The Death of the Author[2].