for $l in .//livre
where some $t in $l//titre/text() satisfies
contains($t, "étoiles")
return <numLivre> {$l/@id}</numLivre>
for $livre in doc("/home/dominique/public_html/Master1/BDA/DocXML/lmsf040.xml")/livre
where every $t in $livre//titre/text() satisfies
contains($t," ")
return {$livre//titre}