Hence, validation can entail a large performance cost if a validating processor needs to parse and build an in-memory representation of a schema before validating each XML document.
因此,如果在验证每个XML文档之前,都要构建模式的内存中表示,验证可能造成很大的性能代价。
2
Normally, an application has a limited set of schemas, and therefore wants the processor to build an in-memory representation of a given schema once and use it to validate documents.