[#boost-urls-uri_reference_rule]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::uri_reference_rule
:relfileprefix: ../../
:mrdocs:

Rule for URI‐reference

== Synopsis

Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/rfc/uri_reference_rule.hpp#L64[boost/url/rfc/uri_reference_rule.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr /* implementation-defined */ uri_reference_rule = {};
----

== Description

== Value Type
[,cpp]
----
using value_type = url_view;
----
== Example
Rules are used with the function xref:boost/urls/grammar/parse-09.adoc[`grammar::parse`].

[,cpp]
----
system::result< url_view > rv = grammar::parse( "ws://echo.example.com/?name=boost#demo", uri_reference_rule );
----
== BNF
[,cpp]
----
URI-reference = URI / relative-ref

URI           = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
relative-ref  = relative-part [ "?" query ] [ "#" fragment ]
----
== Specification
* https://datatracker.ietf.org/doc/html/rfc3986#section-3[]

== See Also

xref:boost/urls/grammar/parse-09.adoc[`grammar&colon;&colon;parse`], xref:boost/urls/parse_uri_reference.adoc[`parse&lowbar;uri&lowbar;reference`], xref:boost/urls/url_view.adoc[`url&lowbar;view`]&period;


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