In this case, casting functions (like $elem cast as xs:integer) are needed to keep the queries working.

这种情况下需要强制类型转换函数（如 $elem cast as xs:integer）来保持查询的有效性。

youdao

The case involved a woman charged with casting a spell on her former husband and his sister.

ECONOMIST: A djinn in an oil barrel

In the case of the New York race, we can console ourselves with the splendid casting of it, and the sheer entertainment ahead.

CNN: Lance Morrow: Hillary vs. Rudy is a race to savor