> ## Documentation Index
> Fetch the complete documentation index at: https://docs.phidata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Text Knowledge Base

The **TextKnowledgeBase** reads **local txt** files, converts them into vector embeddings and loads them to a vector databse.

## Usage

<Note>
  We are using a local PgVector database for this example. [Make sure it's running](https://docs.phidata.com/vectordb/pgvector)
</Note>

```python knowledge_base.py theme={null}
from phi.knowledge.text import TextKnowledgeBase
from phi.vectordb.pgvector import PgVector

knowledge_base = TextKnowledgeBase(
    path="data/txt_files",
    # Table name: ai.text_documents
    vector_db=PgVector(
        table_name="text_documents",
        db_url="postgresql+psycopg://ai:ai@localhost:5532/ai",
    ),
)
```

Then use the `knowledge_base` with an Agent:

```python agent.py theme={null}
from phi.agent import Agent
from knowledge_base import knowledge_base

agent = Agent(
    knowledge_base=knowledge_base,
    search_knowledge=True,
)
agent.knowledge.load(recreate=False)

agent.print_response("Ask me about something from the knowledge base")
```

## Params

| Parameter           | Type               | Default             | Description                                                                           |
| ------------------- | ------------------ | ------------------- | ------------------------------------------------------------------------------------- |
| `path`              | `Union[str, Path]` | -                   | Path to text files. Can point to a single txt file or a directory of txt files.       |
| `formats`           | `List[str]`        | `[".txt"]`          | Formats accepted by this knowledge base.                                              |
| `reader`            | `TextReader`       | `TextReader()`      | A `TextReader` that converts the text files into `Documents` for the vector database. |
| `vector_db`         | `VectorDb`         | -                   | Vector Database for the Knowledge Base.                                               |
| `num_documents`     | `int`              | `5`                 | Number of documents to return on search.                                              |
| `optimize_on`       | `int`              | -                   | Number of documents to optimize the vector db on.                                     |
| `chunking_strategy` | `ChunkingStrategy` | `FixedSizeChunking` | The chunking strategy to use.                                                         |