File Content Extraction 25.4
Filter SDK C++ Programming Guide

# equal_range

Returns a range containing all metadata elements whose (non-standard) key matches the `key` argument.

The range is defined by two iterators. The first points to the first element in the desired range, and the second points past the last element in the desired range.

## Syntax

    std::pair<const_iterator, const_iterator> equal_range(const std::string& key) const;

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Version 25.4 | Last updated October 2025

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Product: File Content Extraction 25.4

Topic Title: equal_range