<) with DisMax, it must be escaped using a backslash.
An alternative to this stage is the
Additional Query Parameters stage.
Collapsing results
In Managed Fusion 5.9.13 and up, you can configure this stage to collapse search results based on a field, such asproduct_id, to group all variations of each item into a single search result.
This is useful for ecommerce sites where you want to show a single product with multiple SKUs or variations.
For additional collapse options, see the configuration reference below.
Configuration
When entering configuration values in the UI, use unescaped characters, such as
\t for the tab character. When entering configuration values in the API, use escaped characters, such as \\t for the tab character.