# Wikipedia txtai embeddings index

This is a txtai embeddings index for the English edition of Wikipedia.

This index is built from the OLM Wikipedia December 2022 dataset. Only the first paragraph of the lead section from each article is included in the index. This is similar to an abstract of the article.

It also uses Wikipedia Page Views data to add a percentile field. The percentile field can be used to only match commonly visited pages.

txtai must be installed to use this model.

## Example

Version 5.4 added support for loading embeddings indexes from the Hugging Face Hub. See the example below.

from txtai.embeddings import Embeddings

# Load the index from the HF Hub
embeddings = Embeddings()

# Run a search
embeddings.search("Roman Empire")

# Run a search matching only the Top 1% of articles
embeddings.search("""
SELECT id, text, score, percentile FROM txtai WHERE similar('Boston') AND
percentile >= 0.99
""")


## Use Cases

An embeddings index generated by txtai is a fully encapsulated index format. It doesn't require a database server or dependencies outside of the Python install.

The Wikipedia index works well as a fact-based context source for conversational search. In other words, search results from this model can be passed to LLM prompts as the context in which to answer questions.