spezielles Template für das System der Stabi Berlin string-join(for $book in $renew-books return x"{uri-encode($book.extendId)}=YES", "&") encode-for-uri( string-join( (if ($book.title) then concat("xtit ", $book.title) else (), if ($book.author) then concat("xprs ", $book.author) else (), if ($book.isbn) then concat("xisb ", $book.isbn) else (), if ($book.year) then concat("xjah ", $book.year) else (), if ($book.keywords) then concat("xslw ", $book.keywords) else ()), " UND ")) 0 $i + 1