File Content Extraction 25.4
Filter SDK C++ Programming Guide

# external

Returns whether the subfile is a link to an external resource. This type of subfile cannot be extracted because it is not stored in the container. You can write code to access the subfile, using the path provided by rawname.

## Syntax

    bool external() const;

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Version 25.4 | Last updated October 2025

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Product: File Content Extraction 25.4

Topic Title: external