If the complex product uses swatches in the product rendering, then swatch data can be indexed. Refer to the 

Swatch details need to be calculated and have to be indexed in all the variants. This calculation needs to be done at your end, Klevu does not calculate how many variants are available in the given swatch detail. These details are returned in the API response for the front end to use for rendering purposes.

Complex products

Swatches

Data Indexing

Introduction

XML API

Overview

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Partial Updates (Patch)

Job Tracking

Swagger/OpenAPI Specification

Batch Updates

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