(: NOM-ADJ :)
for $ligne in doc("bao2_sortiexml_treetagger_3208.xml")//element
let $frere1:= $ligne/following-sibling::*[1]
where $ligne/data[1]="NOM" and $frere1/data[1]="ADJ"
return string-join(($ligne/data[3], $frere1/data[3]), " ")