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48 lines
1.7 KiB
ReStructuredText
Indexes
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==========================
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.. note::
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`Conceptual Guide <https://docs.langchain.com/docs/components/indexing>`_
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**Indexes** refer to ways to structure documents so that LLMs can best interact with them.
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The most common way that indexes are used in chains is in a "retrieval" step.
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This step refers to taking a user's query and returning the most relevant documents.
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We draw this distinction because (1) an index can be used for other things besides retrieval, and
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(2) retrieval can use other logic besides an index to find relevant documents.
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We therefore have a concept of a **Retriever** interface - this is the interface that most chains work with.
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Most of the time when we talk about indexes and retrieval we are talking about indexing and retrieving
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unstructured data (like text documents).
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For interacting with structured data (SQL tables, etc) or APIs, please see the corresponding use case
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sections for links to relevant functionality.
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- `Getting Started <./indexes/getting_started.html>`_: An overview of the indexes.
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Index Types
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---------------------
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- `Document Loaders <./indexes/document_loaders.html>`_: How to load documents from a variety of sources.
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- `Text Splitters <./indexes/text_splitters.html>`_: An overview and different types of the **Text Splitters**.
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- `VectorStores <./indexes/vectorstores.html>`_: An overview and different types of the **Vector Stores**.
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- `Retrievers <./indexes/retrievers.html>`_: An overview and different types of the **Retrievers**.
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.. toctree::
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:maxdepth: 1
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:hidden:
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./indexes/getting_started.ipynb
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./indexes/document_loaders.rst
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./indexes/text_splitters.rst
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./indexes/vectorstores.rst
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./indexes/retrievers.rst
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