File Content Extraction 26.1
Filter SDK C++ Programming Guide

# standard_key

Returns a value from the `MetadataKey` enumeration (see `Keyview_Metadata.hpp`).

If this metadata element has been standardized, the value specifies the standardized field key. For metadata elements that are not standardized, the value is equal to `MetadataKey::Other`.

## Syntax

    MetadataKey standard_key() const;

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Version 26.1 | Last updated January 2026

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Product: File Content Extraction 26.1

Topic Title: standard_key