---
title: "boolean-compound"
slug: "boolean-compound-parser"
updated: 2022-07-27T17:22:03Z
published: 2022-07-27T17:22:03Z
---

> ## 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.

# boolean-compound

The *boolean-compound* **parser** will evaluate or load data via two parsers and combine their **boolean output**. Depending on the value of the *operator* attribute, the combination will evaluate to *true*, *false*, or *null*.

It inherits attributes and behaviors from its parent: abstract **parser** - *boolean*.

Note - the *columns* attribute supersedes the *column* attribute, which is not used in this **parser** type.

## Attribute - operator

The *operator* attribute is required.

```
{
  "parser_type": "boolean-compound", 
  "columns": [
    {...}, // parser one
    {...}  // parser two 
  ],
  
  // The operator attribute defines a comparison function.
  // Options include: 
  // "AND"
  // "OR"
  //
  "operator": "AND"
}
```

## Attribute - columns

The *columns* attribute is required, and it requires that the values within the array are *boolean* type **parsers**.

```
{
  "parser_type": "boolean-compound", 
  "operator": "AND",
  
  // The columns attribute specifies two inner parsers to produce
  // values for comparison
  //
  "columns": [
    {...}, // parser one
    {...} // parser two
  ]
}
```