🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiSvenskaРусскийفارسی한국어中文日本語EntityQ100023· pop 13· linked from 28 articlesmetasyntactic variableplaceholder term used in computer scienceAvailable in 13 languagesFrançaisDeutsch日本語РусскийItalianoHebrewNederlandsPolskiSvenskaUkrainianConnectionsemailEntityprogramming languageEntityCategoriesMetalogicPlaceholdersSyntax (logic)Variable (computer science)