Evolve the XML schema ( upward compatibility) 更新XMLschema(向上兼容性)
For other requirements for upward compatibility, refer to the DB2 Information Center and the developerWorks article," Evolving your XML schemas using DB2 pureXML ". See Resources for the links. 要了解向上兼容性的其他要求,请参阅DB2信息中心和developerWorks文章“EvolvingyourXMLschemasusingDB2pureXML”(参见参考资料中的链接)。
A concern with evolving XML schema with upward compatibility is that XML data cannot be validated with the existence of newly added elements and attributes. 使用向上兼容性更新XMLschema时需要考虑的一个问题是:XML数据具有新添加的元素和属性时不能通过验证。
However, the API may evolve or be entirely replaced in future releases, so upward compatibility may not be present. 但是,该API可能会发生演化,或者在将来的版本中被完全取代,所以可能不具有向上兼容性。
I've already mentioned the problem about evolving an XML schema with upward compatibility, where the existence of newly added elements and attributes cannot be checked. 我已经提到过具有向上兼容性的XMLschema更新的问题,即不能检查新添加的元素和属性是否存在。
These features result in decreasing the design errors in circuit design and making upward compatibility easier. 这样能有效地减少电路设计中可能存在的设计错误,并且使得电路向上兼容更容易。