9.1. 规范性参考文献

以下是 RFC 8141 规范所必需的规范性参考文献:

[RFC20] ASCII Format

Cerf, V., "ASCII format for network interchange", STD 80, RFC 20, DOI 10.17487/RFC0020, October 1969.

定义用于网络交换的 ASCII 字符格式, 它是 URN 字符集的基础.

[RFC2119] Key Words

Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997.

定义 RFC 中用于表示要求级别的关键词 (例如 MUST, SHOULD, MAY) 的含义.

[RFC3986] URI Generic Syntax

Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986, DOI 10.17487/RFC3986, January 2005.

定义 Uniform Resource Identifier (URI) 的通用语法; URN 是 URI 的一个子集.

[RFC5226] IANA Considerations Guidelines

Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 5226, DOI 10.17487/RFC5226, May 2008.

提供在 RFC 中编写 IANA Considerations 小节的指南.

[RFC5234] ABNF Syntax Specification

Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", STD 68, RFC 5234, DOI 10.17487/RFC5234, January 2008.

定义用于语法规范的 Augmented Backus-Naur Form (ABNF); RFC 8141 使用 ABNF 定义 URN syntax.