+<!-- si presuppone che il tipo induttivo non sia mutuamente
+ induttivo. Bisognerebbe andare a vedere l'utlimo parametro
+ del presunto "principio di induzione", tirare fuori il tipo induttivo
+ e vedere se il suo nome coincide con il prefisso di _ind.
+ Ad esempio nat_double_ind e' definito dall'utente. L'ultimo
+ parametro di nat_double_ind e' di tipo nat, e nat e' diverso
+ da nat_double. Per ora, verifico solo l'esistenza di nat_double,
+ ma questo, benche' non porti ad errore, non copre tutti i
+ casi per quelli mutuamente induttivi -->
+
+<xsl:template mode="try_inductive" match="APPLY">
+ <xsl:variable name="id" select="@id"/>
+ <xsl:choose>
+ <xsl:when test="CONST[1]">
+ <xsl:variable name="uri" select="CONST[1]/@uri"/>
+ <xsl:choose>
+ <xsl:when test="contains($uri,'_ind.con')">
+ <xsl:variable name="ind_uri"
+ select="concat(substring-before($uri,'_ind.con'),'.ind')"/>
+ <xsl:variable name="inductive_def"
+ select="document(concat(string($absPath),$ind_uri))/InductiveDefinition"/>
+ <!-- check if the corresponding inductive definition actually
+ exists -->
+ <xsl:choose>
+ <xsl:when test="$inductive_def">
+ <xsl:variable name="ind_name">
+ <xsl:call-template name="get_name">
+ <xsl:with-param name="uri" select="$uri"/>
+ </xsl:call-template>
+ </xsl:variable>
+ <xsl:variable name="no_params">
+ <xsl:call-template name="get_no_params">
+ <xsl:with-param name="first_uri" select="$CICURI"/>
+ <xsl:with-param name="second_uri" select="$uri"/>
+ </xsl:call-template>
+ </xsl:variable>
+ <xsl:apply-templates mode="inductive" select=".">
+ <xsl:with-param name="inductive_def_uri"
+ select="$ind_uri"/>
+ <xsl:with-param name="inductive_def"
+ select="$inductive_def"/>
+ <xsl:with-param name="section_params" select="$no_params"/>
+ <xsl:with-param name="inductive_def_index" select="1"/>
+ <xsl:with-param name="inductive_def_name" select="$ind_name"/>
+ </xsl:apply-templates>
+ </xsl:when>
+ <xsl:otherwise>
+ <xsl:apply-templates mode="letin" select="."/>
+ </xsl:otherwise>
+ </xsl:choose>
+ </xsl:when>
+ <xsl:otherwise>
+ <xsl:apply-templates mode="letin" select="."/>
+ </xsl:otherwise>
+ </xsl:choose>
+ </xsl:when>
+ <xsl:otherwise>
+ <xsl:apply-templates mode="letin" select="."/>
+ </xsl:otherwise>
+ </xsl:choose>
+</xsl:template>
+
+