URL
RFC 1738 Uniform Resource Locators (URL) → Update 2396 → Update 3986 URIへ統合 (廃止ではない)
RFC 1808 相対URL Relative Uniform Resource Locators → Update 2396 → (廃止) 3986
RFC 2255 →4510,4516 LDAP URL format
RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax → 3986 RFC 2732 Format for Literal IPv6 Addresses in URL's → 3986
RFC 3305 Report from the Joint W3C/IETF URI Planning Interest Group: Uniform Resource Identifiers (URIs), URLs, and Uniform Resource Names (URNs): Clarifications and Recommendations
RFC 3492 Punycode は古いかどうか
RFC 3966 tel
RFC 3986 Uniform Resource Identifier (URI): Generic Syntax
RFC 4248 telnet
RFC 4266 gopher
RFC 4395 Guidelines and Registration Procedures for New URI Schemes → 7595
RFC 5892
RFC 5092 IMAP URL Scheme
RFC 6196
RFC 6874 IPv6 のZone使う
RFC 7565 The 'acct' URI Scheme
RFC 7595 Guidelines and Registration Procedures for URI Schemes
RFC 8089 file:
RFC 8820 URI Design and Ownership
RFC 1738 URL (旧)
Java は RFC 2396 URI + 2732 ZoneベースのParserを持っているのでやや古い