| (: insert-start :) | |
| declare variable $input-context external; | |
| (: insert-end :) | |
| <results> | |
| { | |
| let $doc := $input-context | |
| for $t in distinct-values($doc//book/title) | |
| let $p := $doc//book[title = $t]/price | |
| return | |
| <minprice title="{ $t }"> | |
| <price>{ min($p) }</price> | |
| </minprice> | |
| } | |
| </results> |