specify an attribute

• 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