[#BloombergLP-balxml-Formatter-addHeader]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balxml.adoc[balxml]::xref:BloombergLP/balxml/Formatter.adoc[Formatter]::addHeader
:relfileprefix: ../../../
:mrdocs:

Add XML header with optionally specified `encoding`. Version is always "1.0". The behavior is undefined unless `addHeader` is the first manipulator (with the exception of `rawOutputStream`) after construction or `reset`.

== Synopsis

Declared in `<balxml_formatter.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
addHeader(std::string_view const& encoding = "UTF‐8");
----


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