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公共技术标识符 (PTI) 2021-2024 财年战略规划草案


评议开放日期: 2020 年 4 月 20 日 截止日期: 2020 年 6 月 1 日
发起组织: 互联网号码分配机构 (IANA)
类别/标签: 战略
简介: 公共技术标识符 (Public Technical Identifiers, PTI) 是 ICANN 的附属机构,负责运营互联网号码分配机构 (IANA) 的各项职能。PTI 的《章程》要求该机构拥有自己的战略规划。这一要求使得 PTI 无需浮于较为宽泛的 ICANN《战略规划》之上,而能够细致深入地编制详细的 IANA 相关目标。这份 PTI 的《战略规划》将覆盖 2021-2024 财年。

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Domain Name System
Internationalized Domain Name ,IDN,"IDNs are domain names that include characters used in the local representation of languages that are not written with the twenty-six letters of the basic Latin alphabet ""a-z"". An IDN can contain Latin letters with diacritical marks, as required by many European languages, or may consist of characters from non-Latin scripts such as Arabic or Chinese. Many languages also use other types of digits than the European ""0-9"". The basic Latin alphabet together with the European-Arabic digits are, for the purpose of domain names, termed ""ASCII characters"" (ASCII = American Standard Code for Information Interchange). These are also included in the broader range of ""Unicode characters"" that provides the basis for IDNs. The ""hostname rule"" requires that all domain names of the type under consideration here are stored in the DNS using only the ASCII characters listed above, with the one further addition of the hyphen ""-"". The Unicode form of an IDN therefore requires special encoding before it is entered into the DNS. The following terminology is used when distinguishing between these forms: A domain name consists of a series of ""labels"" (separated by ""dots""). The ASCII form of an IDN label is termed an ""A-label"". All operations defined in the DNS protocol use A-labels exclusively. The Unicode form, which a user expects to be displayed, is termed a ""U-label"". The difference may be illustrated with the Hindi word for ""test"" — परीका — appearing here as a U-label would (in the Devanagari script). A special form of ""ASCII compatible encoding"" (abbreviated ACE) is applied to this to produce the corresponding A-label: xn--11b5bs1di. A domain name that only includes ASCII letters, digits, and hyphens is termed an ""LDH label"". Although the definitions of A-labels and LDH-labels overlap, a name consisting exclusively of LDH labels, such as"""" is not an IDN."