urn

This is the class of URI (Universal Resource Indicator) objects.URN's are a subset of URI's. RFC8141 defines URNs as:

<URN> ::= "urn:" <NID> ":" <NSS> "?+" <r-component> "?=" <q-component> "#" <f-component>

where <NID> is the Namespace Identifier, and <NSS> is the Namespace Specific String, and then the r, q, and f components. The leading "urn:" sequence is case-insensitive. urn-nid accesses the NID of an URN. The related function urn-nss accesses the NSS. urn-r-component, urn-q-component, and urn-f-component access the r, q, and f components. The Namespace ID determines the syntactic interpretation of the Namespace Specific String. Thus:

cg-user(13): (setq urn (net.uri:parse-uri "urn:foo:10?+rrr?=qqq#fff"))
#<urn urn:foo:10?+rrr?=qqq#fff>
cg-user(14): (net.uri:urn-nid urn)
"foo"
cg-user(15): (net.uri:urn-nss urn)
"10"
cg-user(16): (net.uri:urn-r-component urn)
"rrr"
cg-user(17): (net.uri:urn-q-component urn)
"qqq"
cg-user(18): (net.uri:urn-f-component urn)
"fff"
cg-user(19): 

See also uri.htm for general information on Universal Resource Indicator support in Allegro CL.

Copyright (c) 1998-2022, Franz Inc. Lafayette, CA., USA. All rights reserved.
This page was not revised from the 10.0 page.
Created 2019.8.20.