Built-in Functions - open(), Python Software Foundation, 2024 - Official documentation for Python's open() function, detailing file handling and character encoding options.
pypdf Documentation, pypdf developers, 2024 - Comprehensive documentation for the pypdf library, including examples for extracting text from PDF files.
Beautiful Soup 4 Documentation, Leonard Richardson, 2024 - A guide to using Beautiful Soup for parsing HTML and XML documents to extract content.
Document loaders, LangChain, 2024 - Describes LangChain's document loading system, supporting various data sources for RAG applications.