It introduces the concept of "flexible amount of space occupied" and the method of "giant function transformationspace".
引入“柔性体量”概念和“功能转换空间”方法，强调外部空间关系的整合、公共功能空间的优化组织。
2
With no interpretation or transformation, the native format message has the shortest time and uses the least amount of memory space.
因为不需要解释或转换，原生格式消息使用的时间最短，空间最少。
3
Because these nodes are rarely accessed in the course of a transformation, Saxon constructs these nodes on demand rather than having them permanently take up space on the tree.