A tokenizer of type pattern that can flexibly separate text into terms via a regular expression. Accepts the following settings:
| Setting | Description |
|---|---|
| pattern | The regular expression pattern, defaults to W+. |
| flags | The regular expression flags. |
| group | Which group to extract into tokens. Defaults to -1 (split). |
IMPORTANT: The regular expression should match the token separators, not the tokens themselves.