| Uniform Resource Identifer (URI) Schemes per [RFC4395]
[RFC4395] defines an IANA maintained registry of URI Schemes. These registries include the Permanent and Provisional URI Schemes. Permanent URI Schemes
URI Scheme | Description | Reference
acap | application configuration access protocol | [RFC2244]
cid | content identifier | [RFC2392]
crid | TV-Anytime Content Reference Identifier | [RFC4078]
data | data | [RFC2397]
dav | dav | [RFC2518]
dict | dictionary service protocol | [RFC2229]
dns | Domain Name System | [RFC4501]
fax | fax | [RFC2806]
file | Host-specific file names | [RFC1738]
ftp | File Transfer Protocol | [RFC1738]
go | go | [RFC3368]
gopher | The Gopher Protocol | [RFC4266]
h323 | H.323 | [RFC3508]
http | Hypertext Transfer Protocol | [RFC2616]
https | Hypertext Transfer Protocol Secure | [RFC2818]
im | Instant Messaging | [RFC3860]
imap | internet message access protocol | [RFC2192]
info | Information Assets with Identifiers in Public Namespaces | [RFC-vandesompel-info-uri-04.txt]
ipp | Internet Printing Protocol | [RFC3510]
iris.beep | iris.beep | [RFC3983]
ldap | Lightweight Directory Access Protocol | [RFC-ietf-ldapbis-url-09.txt]
mailto | Electronic mail address | [RFC2368]
mid | message identifier | [RFC2392]
modem | modem | [RFC2806]
mtqp | Message Tracking Query Protocol | [RFC3887]
mupdate | Mailbox Update (MUPDATE) Protocol | [RFC3656]
news | USENET news | [RFC1738]
nfs | network file system protocol | [RFC2224]
nntp | USENET news using NNTP access | [RFC1738]
opaquelocktoken | opaquelocktokent | [RFC2518]
pop | Post Office Protocol v3 | [RFC2384]
pres | Presence | [RFC3859]
rtsp | real time streaming protocol | [RFC2326]
service | service location | [RFC2609]
sip | session initiation protocol | [RFC3261]
sips | secure session initiation protocol | [RFC3261]
snmp | Simple Network Management Protocol | [RFC4088]
soap.beep | soap.beep | [RFC3288]
soap.beeps | soap.beeps | [RFC3288]
tag | tag | [RFC4151]
tel | telephone | [RFC2806]
telnet | Reference to interactive sessions | [RFC4248]
tftp | Trivial File Transfer Protocol | [RFC3617]
tip | Transaction Internet Protocol | [RFC2371]
urn | Uniform Resource Names (click for registry) | [RFC2141]
vemmi | versatile multimedia interface | [RFC2122]
xmlrpc.beep | xmlrpc.beep | [RFC3529]
xmlrpc.beeps | xmlrpc.beeps | [RFC3529]
xmpp | Extensible Messaging and Presence Protocol | [RFC-saintandre-xmpp-iri-04.txt]
z39.50r | Z39.50 Retrieval | [RFC2056]
z39.50s | Z39.50 Session | [RFC2056]
Provisional URI Schemes
URI Scheme | Description | Reference
afs | Andrew File System global file names | [RFC1738]
dtn | DTNRG research and development | [draft-irtf-dtnrg-arch] [RFC3987] [http://www.dtnrg.org/wiki/Code] [draft-irtf-dtnrg-bundle-security] [draft-irtf-dtnrg-sec-overview]
mailserver | Access to data available from mail servers | [RFC1738]
tn3270 | Interactive 3270 emulation sessions | [RFC1738]
Historical URI Schemes
URI Scheme | Description | Reference
prospero | Prospero Directory Service | [RFC4157]
wais | Wide Area Information Servers | [RFC4156]
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