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The following normalizations are described in RFC 3986 [1] to result in equivalent URIs: . Converting percent-encoded triplets to uppercase. The hexadecimal digits within a percent-encoding triplet of the URI (e.g., %3a versus %3A) are case-insensitive and therefore should be normalized to use uppercase letters for the digits A-F. [2] Example:
The new RFC changed the meaning of U in URI from "Universal" to "Uniform." In December 1999, RFC 2732 [ 12 ] provided a minor update to RFC 2396, allowing URIs to accommodate IPv6 addresses. A number of shortcomings discovered in the two specifications led to a community effort, coordinated by RFC 2396 co-author Roy Fielding , that culminated ...
URL encoding, officially known as percent-encoding, is a method to encode arbitrary data in a uniform resource identifier (URI) using only the US-ASCII characters legal within a URI. Although it is known as URL encoding , it is also used more generally within the main Uniform Resource Identifier (URI) set, which includes both Uniform Resource ...
RFC 2228 introduced the concept of protected replies to increase security over FTP communications. The 6xx replies are Base64 encoded protected messages that serves as responses to secure commands. When properly decoded, these replies fall into the above categories.
A Uniform Resource Name (URN) is a Uniform Resource Identifier (URI) that uses the urn scheme. URNs are globally unique persistent identifiers assigned within defined namespaces so they will be available for a long period of time, even after the resource which they identify ceases to exist or becomes unavailable. [ 1 ]
RFC 2960, RFC 4960, RFC 3286 Tag URI scheme: RFC 4151 TELNET: RFC 15, RFC 854, RFC 855 Transmission Control Protocol: RFC 675, RFC 793, RFC 9293 Transport Layer Security 1.0: RFC 2246 Trivial File Transfer Protocol: RFC 783, RFC 1350 Usenet: RFC 850, RFC 1036 Uniform Resource Identifier: RFC 3986 User Datagram Protocol: RFC 768 UTF-8: RFC 3629 ...
The address and port are contained in the c- and m-lines, but also in the path attribute on an a-line. Generally, other media types use the c-line and m-line to describe the address and port, but the MSRP RFC 4975 section 8.1 says the path attribute is the authoritative source for MSRP.
In the Domain Name System, a Uniform Resource Identifier (URI) record (RFC 7553) is a means for publishing mappings from hostnames to URIs. Record format [ edit ]