Certificates are now classified as "DV" (Domain Validated), "OV" (Organization Validated), "IV" (Individual Validated), and "EV" (Extended Validation), and a method is defined within the specification to distinguish the types of certificates.
证书现分类为“DV”（域名验证），“OV”（组织验证）、“IV”（个体验证）和“EV”（扩展验证），并在该规范中定义了一种方法区分证书类型的方法。