for $el at $i in doc("/Users/julie/Documents/projet_encadre/BAO3/fixed/corpus-titre-description-fixed3246.xml")//item/descendant::element
let $n := $el/data[@type='type']
let $a := $el/following-sibling::element[1]/data[@type='type']
where (($n/text()='NOM') and ($a/text()='ADJ'))
let $na := string-join(($el/data[@type='string'],$el/following-sibling::element[1]/data[@type='string']), " ")
return $na