# Deduplication arrays

Published 30 September 2025 · Event Gateway

Support array elements in field-based deduplication rules

Deduplication rules now support array notation in field paths, allowing you to target specific elements or all elements within arrays when defining field-based deduplication strategies.

* Wildcard Matching: Use `[*]` to match all elements in an array (e.g., `body.items[*].sku` matches all SKU values)
* Index Matching: Use `[n]` to target specific array elements by index (e.g., `body.items[0].name` matches the first item's name)

This enhancement makes it easier to deduplicate events with array in the payloads.