[#BloombergLP-balxml-NamespaceRegistry-lookup-00]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balxml.adoc[balxml]::xref:BloombergLP/balxml/NamespaceRegistry.adoc[NamespaceRegistry]::lookup
:relfileprefix: ../../../
:mrdocs:

Return the null‐terminated string containing the URI of the namespace registered with the specified `id` or an empty (not null) string if `id` does not correspond to a preregistered namespace or a namespace that was previously registered with this object.

== Synopsis

Declared in `<balxml_namespaceregistry.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
char const*
lookup(int id) const;
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#