[#BloombergLP-balxml-Reader-XmlResolverFunctor]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balxml.adoc[balxml]::xref:BloombergLP/balxml/Reader.adoc[Reader]::XmlResolverFunctor
:relfileprefix: ../../../
:mrdocs:

Type for a user supplied functor that finds and opens an external resource for the specified `location` and/or `namespaceUri` and returns that resource as a managed pointer to a stream. The `location` argument specifies the location of the external resource and is typically a filename or a URI, depending on the context. The `namespaceUri` argument always refers to the XML namespace of the entity to be resolved. A conforming functor returns an empty managed pointer if it cannot resolve the resource. For example, the reader may use a resolver to open an external entity, even if the reader does not do validation (see definition of `<!ENTITY>` in the XML standard). Note that either argument can be NULL in situations where its value is not needed or can be computed from the other argument.

== Synopsis

Declared in `<balxml_reader.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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typedef xref:bsl/function-0a.adoc[bsl::function<StreamBufPtr(char const*, char const*)>] XmlResolverFunctor;
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