关于dop的理解
关于DOP，有两个问题，麻烦大家帮忙解答。1）新标准的Dop日期之后，Dow之前，产品还能不能按旧标准申请认证？
2）新标准的Dop日期之后，Dow之前，如果由于产品的结构改变，需要更新已有的报告，能否不考虑新标准，只在旧标准的报告上更新报告？
Cenelec网站上的官方解释是：
(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
技术委员会签署日期
(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat
印发日期
(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level
各成员国的最晚宣告日期（宣告该标准即将生效，让厂商做好准备）
(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement
各成员国出版或采用为国家标准的最晚日期，同时也是标准的生效日期。
(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn
旧标准的失效日期 应该是可以的新标准实施之后也会给予一段过度期
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