File Content Extraction 25.3
Filter SDK C++ Programming Guide

# The SubfileExtractInfo Struct

Provides information about a subfile that has been extracted.

    struct SubfileExtractInfo
    {
        bool may_contain_subfiles;
        bool charset_converted;
        bool external;
        bool non_formatted_body_extracted;
    };

Member | Description
--- | ---
`may_contain_subfiles` | Whether the extracted file may contain subfiles and should be extracted further.
`charset_converted` | Whether the subfile's character encoding was converted.
`external` | Whether the subfile is embedded in the main file as a link and is stored externally. This type of subfile cannot be extracted because it is not stored in the container.
`non_formatted_body_extracted` | When formatted_mail is `true`, specifies whether a mail message was extracted as plain text due to an error extracting its formatted version.

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Version 25.3 | Last updated July 2025

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Product: File Content Extraction 25.3

Topic Title: The SubfileExtractInfo Struct