之所以出现此标记，是因为目标映射中有数组结构。

This is due to the array structure within the target map.

youdao

这可以像数据库中的记录表示形式一样简单，其中包括列名称与XML标记之间的映射，XML中的元素值包含行值。

This could be a thing as simple as a representation of a record in a database that consists of a mapping between column names and XML tags, where the element values in the XML contain the row values.

youdao

在以上的映射中请注意，少数映射被标记为警告。

Notice that in the mapping above, a few of the mappings are flagged with warnings.

youdao