The mapping table also allows the user to convert source types to target types, or define constant mappings that set constant values to items in the target schema.
映射表还允许用户将源类型转化成目标类型,或定义常量映射 来将常量设置为目标架构中的项目。
2
An assign parameter mapping lets you specify a constant value to put in a target parameter.
赋值参数映射允许您指定一个常数值来放在目标参数中。
3
Namespace prefixes are basically meaningless to anyone except the author of the original document and relying on a constant one-to-one mapping of namespace prefixes to URIs is unwise at best.