if per verificare se una variabile viene valorizzata

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  1. <xsl:variable name="idcat" select="/pagina/informazioni/catalogo/@idcat"/>
  3. <xsl:if test="@id_categoria !='80' and @id_categoria !='93' and @id_categoria !='102' and $idcat != '102' or not (/pagina/informazioni/catalogo/@idcat)">

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