15. Optional: If using the NLTK machine learning processing (see
[`PAPERLESS_ENABLE_NLTK`](configuration.md#PAPERLESS_ENABLE_NLTK) for details),
download the NLTK data for the Snowball
- Stemmer, Stopwords and Punkt tokenizer to your
- `PAPERLESS_DATA_DIR/nltk`. Refer to the [NLTK
+ Stemmer, Stopwords and Punkt tokenizer to `/usr/share/nltk_data`. Refer to the [NLTK
instructions](https://www.nltk.org/data.html) for details on how to
download the data.