---
title: "Data function - set-union"
slug: "set-union-data-function"
updated: 2022-07-27T14:24:03Z
published: 2022-07-27T14:24:03Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://code.tag.bio/llms.txt
> Use this file to discover all available pages before exploring further.

# set-union

### set-union

**creates: *categorical variable***

A `set-union` data function evaluates the intersection, i.e. the OR operation, for two or more categorical variables, data functions, or argument-references.

| **attribute** | **type** | **description** | **options** |
| --- | --- | --- | --- |
| `criteria` | array | categorical data | `variable``data_function``argument_reference` |

```
{
  "data_function_type": "set-union",
  "criteria": [
    ...,
    ...
  ]
}
```