Answer: Version 5.0 provides WS-Security headers with username tokens, x509 certs, identity assertions, dig sigs, and encryption as a Tech Preview.

答：版本5.0为ws - security头提供了用户名令牌、x509证书、身份断言、数字签名和加密作为技术预览。

Based on a strategic ally relationship created among relevant enterprises, measures of purchasing materials according to the ally relationship were put forward and implemented at SIGS.

在把握企业间战略联盟关系的基础上，提出了韶钢原材料采购中实施战略联盟的措施。