:relfileprefix: ../../../ [#boost-urls-param-value] = xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/param.adoc[pass:[param]]::value The value == Synopsis Declared in header `` [source,cpp,subs="verbatim,macros,-callouts"] ---- xref:std.adoc[std]::string value; ---- == Description The presence of a value is indicated by xref:boost/urls/param/has_value.adoc[has_value] equal to true. An empty value is distinct from no value.