---
title: NLU Boundaries
slug: v111/nlu-boundaries
icon: {"faIcon":"fa-solid fa-tape"}
createdAt: 2025-06-23T03:29:44.063Z
---

Sofi has several boundary areas. The first is the NLU model boundary, which controls intents, entities, and features in Sofi. The second area is quota limits based on key type.

| Area          | Limit                           |
| ------------- | ------------------------------- |
| Intents       | 500                             |
| List entities | Parent: 50, child: 20,000 items |
| Simple        | 30                              |
| Utterance     | 500 characters                  |
| Utterances    | 15,000                          |

Do not use the following characters in intent and entity names:

| Character | Name                |
| --------- | ------------------- |
| \{        | Left curly bracket  |
| }         | Right curly bracket |
| \[        | Left bracket        |
| ]         | Right bracket       |
| \\        | Backslash           |

\*\*Updated about 5 years ago

***