尝试一下: sed's/< workdocument [^ \/] * \/>//'

在工作文档之后使用 [^/] * 代替.* ，以便其匹配不超过第一个/> . [^/] 匹配除/以外的所有字符.

This uses [^/]* instead of .* after workdocument so that its match doesn't exceed the first />. [^/] matches every character other than /.