1. Introduction to RAG architecture
RAG architecture is presented as a way to extend language models with external knowledge sources. The section explains how the main components interact, how information moves through the system, and where LangChain supports the construction of end-to-end applications.
- concept of operation and advantages over standard language models,
- overview of system components and information flow,
- role of the LangChain library in building applications.
2. Input data processing
Before retrieval can work well, documents must be converted into usable input units. The focus is on extracting content with parsers, dividing text into chunks, and selecting splitting parameters that preserve meaning while supporting efficient indexing and later search.
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use of parsers for extracting content from documents,
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text segmentation strategies into smaller fragments (chunking),
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selection of optimal content splitting parameters.
3. Semantic modeling and embeddings
Embeddings convert textual meaning into vector form, which enables semantic comparison and retrieval. This section explains how current embedding models and generators differ, and how to choose a representation approach that matches the nature and variability of the processed data.
- the essence of embeddings: transforming the meaning of text into vectors,
- overview of current models and generators of vector representations,
- criteria for selecting a model in terms of data specificity.
4. Operation of the Qdrant vector database
Qdrant serves as the storage layer for vector data and related records in the RAG pipeline. The training addresses environment setup, collection management, record operations such as add, update, and delete, and practical integration of Qdrant with LangChain components.
- environment configuration and management of data collections,
- operations on records: adding, modifying and deleting information,
- mechanisms for integrating the Qdrant database with the LangChain system.
5. Advanced Retrieval Mechanisms (Retrieval)
Finding the right document depends on more than a basic similarity search. Participants work with semantic retrieval, metadata-based filtering, and reranking techniques to improve result precision and increase the relevance of materials passed to the generation stage.
- implementation of semantic search (Semantic Search),
- use of metadata for precise filtering of results,
- application of Reranking techniques to improve document relevance.
6. Response generation and prompt engineering
Prompt Templates shape how the model receives instructions and uses retrieved evidence. The section focuses on combining user queries with contextual materials and on generating responses that synthesize source content instead of relying on unsupported model assumptions.
- designing instruction templates (Prompt Templates),
- combining the retrieved context with the user's query,
- synthesizing responses based on the provided source materials.
7. Quality analysis and system evaluation
Reliable RAG output requires systematic evaluation, not only manual review. This part uses the deepeval library to define and measure key quality metrics, and to automate verification of whether generated answers remain correct against the expected standard.
- use of the deepeval library in the testing process,
- definition and measurement of key RAG quality metrics,
- automation of the verification of the correctness of generated content.
8. Summary and practical implementation
A complete application is used here to connect the earlier stages into one working RAG flow. Participants follow how data is loaded into the database and then turned into usable knowledge through response generation based on the prepared resources.
- presentation of a ready application for feeding the database and generating knowledge.