# metadata_map

Get document metadata from a file.

This function converts all metadata values of any type are converted to UTF-8 strings. It outputs date/time values in UTC in the ISO-8601 date format YYYY-MM-DDThh:mm:ssZ. For example 2016-02-09T16:15:51Z.

## Syntax

    template<typename Input_Type >
    std::multimap<std::string, std::string> Session::metadata_map(Input_Type &input)

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