langchain/docs/versioned_docs/version-0.2.x/integrations/providers/doctran.mdx

# Doctran

>[Doctran](https://github.com/psychic-api/doctran) is a python package. It uses LLMs and open-source 
> NLP libraries to transform raw text into clean, structured, information-dense documents 
> that are optimized for vector space retrieval. You can think of `Doctran` as a black box where 
> messy strings go in and nice, clean, labelled strings come out.


## Installation and Setup

```bash
pip install doctran
```

## Document Transformers

### Document Interrogator

See a [usage example for DoctranQATransformer](/docs/integrations/document_transformers/doctran_interrogate_document).

```python
from langchain_community.document_loaders import DoctranQATransformer
```
### Property Extractor

See a [usage example for DoctranPropertyExtractor](/docs/integrations/document_transformers/doctran_extract_properties).

```python
from langchain_community.document_loaders import DoctranPropertyExtractor
```
### Document Translator

See a [usage example for DoctranTextTranslator](/docs/integrations/document_transformers/doctran_translate_document).

```python
from langchain_community.document_loaders import DoctranTextTranslator
```