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The orthographic norms of Catalan were first defined officially in the First International Congress of the Catalan Language, held in Barcelona October 1906. Subsequently, the Philological Section of the Institut d'Estudis Catalans (IEC, founded in 1911) published the Normes ortogràfiques in 1913 under the direction of Antoni Maria Alcover and Pompeu Fabra. Despite some opposition, the spelling system was adopted immediately and became widespread enough that, in 1932, Valencian writers and intellectuals gathered in Castelló de la Plana to make a formal adoption of the so-called Normes de Castelló, a set of guidelines following Pompeu Fabra's Catalan language norms.
In 1917, Fabra published an Orthographic Dictionary following the orthographic norms of the IEC. In 1931-32 the Diccionari General de la Llengua Catalana (General Dictionary of the Catalan language) appeared. In 1995, a new normative dictionary, the Dictionary of the Catalan Language of the Institute of Catalan Studies (DIEC), supposed a new milestone in the orthographic fixation of the language, in addition to the incorporation of neologisms and modern uses of the language.