Strategies for Efficient Data Embedding

Two approaches to generating optimized embeddings in the Retrieval-Augmented Generation (RAG) Pattern

1. Creating Embeddings Optimized for Accuracy
   If you’re optimizing for accuracy, a good practice is to first summarize the entire document, then store the summary text and the embedding together. For the rest of the document, you can simply create overlapping chunks and store the embedding and the chunk text together.

2. Creating Embeddings Optimized for Storage
   If you’re optimizing for space, you can chunk the data, summarize each chunk, concatenate all the summarizations, then create an embedding for the final summary.

Example

import os

from langchain_community.document_loaders import TextLoader
from langchain_openai import OpenAIEmbeddings
from langchain_text_splitters import CharacterTextSplitter
from langchain.docstore.document import Document
from langchain_community.vectorstores import FAISS
from openai import OpenAI

from embedding_optimizer.optimizer import EmbeddingOptimizer

# Set your OpenAI API Key
os.environ['OPENAI_API_KEY'] = ''

# Load your document
raw_document = TextLoader('test_data.txt').load()

# If your document is long, you might want to split it into chunks
text_splitter = CharacterTextSplitter(separator=".", chunk_size=1000, chunk_overlap=0)
documents = text_splitter.split_documents(raw_document)

embedding_optimizer = EmbeddingOptimizer(openai_api_key='')

# documents_optimizer = embedding_optimizer.optimized_documents_for_storage(raw_document[0].page_content, documents)
documents_optimizer = embedding_optimizer.optimized_documents_for_accuracy(raw_document[0].page_content, documents)

# Embed the document chunks and the summary
embedding_model = OpenAIEmbeddings(openai_api_key=os.environ["OPENAI_API_KEY"])

db = FAISS.from_documents(documents_optimizer, embedding_model)

# query it
query = "What motivated Alex to create the Function of Everything (FoE)?"
docs = db.similarity_search(query)

print(docs[0].page_content)

Additionally, there are two functions available for summarizing extensive texts via OpenAI

First method: summarize each part independently The first solution would be to split the text into multiple chunks. Then for each chunk, we would ask the API to summarize this part of the text. Then we would join together all the sub-summaries.

from embedding_optimizer.optimizer import EmbeddingOptimizer

summary_optimizer = EmbeddingOptimizer(openai_api_key='')
summary = summary_optimizer.summarize_each_part_independently("What motivated Alex to create the Function of Everything (FoE)?", chunk_size=100)

Second method: summarize the text incrementally For this second solution, our main goal is to solve the problems encountered with our first solution. We want to have a more coherent and structured summary. Our solution is to build our summary progressively. Instead of creating multiple sub-summaries and then combining them into one big summary, for each prompt, we are going to provide a chunk of text to summarize and the last 500 tokens of our summary. Then we will ask OpenAI to summarize the chunk of text and add it organically to the current summary.

from embedding_optimizer.optimizer import EmbeddingOptimizer

summary_optimizer = EmbeddingOptimizer(openai_api_key='')
summary = summary_optimizer.summarize_text_incrementally("What motivated Alex to create the Function of Everything (FoE)?", chunk_size=100)

Installation

$ pip install embedding-optimizer

Also can be found on pypi

How can I use it?

• Install the package by pip package manager.
• After installing, you can use it and call the library.

Issues

Feel free to submit issues and enhancement requests.

Contributing

Please refer to each project's style and contribution guidelines for submitting patches and additions. In general, we follow the "fork-and-pull" Git workflow.

1. Fork the repo on GitHub
2. Clone the project to your own machine
3. Update the Version inside init.py
4. Commit changes to your own branch
5. Push your work back up to your fork
6. Submit a Pull request so that we can review your changes