If an instance document contains an xml attribute and the schema specifies an attribute wildcard with processcontents set to lax , the validation engine will use the xml namespace schema present in the 如果实例文档包含xml属性，并且架构通过将processcontents设置为“ lax ”指定属性通配符，则验证引擎将使用
If an instance document contains an xml attribute and the schema specifies an attribute wildcard with processcontents either omitted or set to strict , the validation engine will use the xml namespace schema present in the 如果实例文档包含xml属性，并且架构通过省略processcontents或将其设置为“ strict ”来指定属性通配符，则验证引擎将使用
