CH14 chain (Chains)

The chain creation phase is a step that binds all of the previous seven-step processes together and assembles them into one RAG pipeline to complete.

The structure below represents the structure of the document-based RAG.

• LCEL grammar

• LangChain Chains

Reference

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# Run Chain
# Enter a query for the document and print out the answer.
question = "The name of the AI ​​developed by Samsung Electronics is?"
response = chain.invoke(question)

Below is the quintet code for the finished chain.

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# Create a Chain
chain = (
    {"context": retriever, "question": RunnablePassthrough()}
    | prompt
    | llm
    | StrOutputParser()
)

LCEL (LangChain Expression Language) grammar is used to tie the entire process of the previous 7 steps into one chain.

Reference

• LCEL grammar

• LangChain Chains