> ## Documentation Index
> Fetch the complete documentation index at: https://llm-tools.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 🔍 Semantic Search

Semantic searching, which involves understanding the intent and contextual meaning behind search queries, is yet another popular use-case of RAG. It has several popular use cases across various domains:

* **Information Retrieval**: Enhances search accuracy in databases and websites
* **E-commerce**: Improves product discovery in online shopping
* **Customer Support**: Powers smarter chatbots for effective responses
* **Content Discovery**: Aids in finding relevant media content
* **Knowledge Management**: Streamlines document and data retrieval in enterprises
* **Healthcare**: Facilitates medical research and literature search
* **Legal Research**: Assists in legal document and case law search
* **Academic Research**: Aids in academic paper discovery
* **Language Processing**: Enables multilingual search capabilities

EmbedJs offers a simple yet customizable `search()` API that you can use for semantic search. See the example in the next section to know more.

## Example: Semantic Search over Next.JS Website + Forum

### Step 1: Set Up Your RAG Pipeline

First, let's create your RAG pipeline. Open your NodeJs application and add the following code:

```ts Create pipeline theme={null}
import { RAGApplicationBuilder } from '@llm-tools/embedjs';
import { OpenAiEmbeddings } from '@llm-tools/embedjs-openai';
import { HNSWDb } from '@llm-tools/embedjs-hnswlib';

const app = await new RAGApplicationBuilder()
.setModel(SIMPLE_MODELS.OPENAI_GPT4_O)
.setEmbeddingModel(new OpenAiEmbeddings())
.setVectorDatabase(new HNSWDb())
.build();
```

This initializes your application.

### Step 2: Populate Your Pipeline with Data

Now, let's add data to your pipeline. We'll include the Next.JS website and its documentation:

```ts Ingest data sources theme={null}
import { SitemapLoader } from '@llm-tools/embedjs-loader-sitemap';

//Add Next.JS Website and docs
app.addLoader(new SitemapLoader({ url: "https://nextjs.org/sitemap.xml" }))

//Add Next.JS Forum data
app.addLoader(new SitemapLoader({ url: "https://nextjs-forum.com/sitemap.xml" }))
```

This step incorporates over **15K pages** from the Next.JS website and forum into your pipeline. For more data source options, check the [EmbedJs data sources overview](/components/data-sources/overview).

### Step 3: Local Testing of Your Pipeline

Test the pipeline on your local machine:

```ts Search App theme={null}
app.search("Summarize the features of Next.js 14?")
/*[
  {
    'score': 0.99,
    'pageContent': 'Next.js 14 | Next.jsBack to BlogThursday, October 26th 2023Next.js 14Posted byLee Robinson@leeerobTim Neutkens@timneutkensAs we announced at Next.js Conf, Next.js 14 is our most focused release with: Turbopack: 5,000 tests passing for App & Pages Router 53% faster local server startup 94% faster code updates with Fast Refresh Server Actions (Stable): Progressively enhanced mutations Integrated with caching & revalidating Simple function calls, or works natively with forms Partial Prerendering',
    'metadata': {
      'id': '6c8d1a7b-ea34-4927-8823-daa29dcfc5af',
      'uniqueLoaderId': '6c8d1a7b-ea34-4927-8823-xba29dcfc5ac',
      'source': 'https://nextjs.org/blog/next-14'
    }
  },
  {
    'score': 0.98,
    'pageContent': 'Next.js 13.3 | Next.jsBack to BlogThursday, April 6th 2023Next.js 13.3Posted byDelba de Oliveira@delba_oliveiraTim Neutkens@timneutkensNext.js 13.3 adds popular community-requested features, including: File-Based Metadata API: Dynamically generate sitemaps, robots, favicons, and more. Dynamic Open Graph Images: Generate OG images using JSX, HTML, and CSS. Static Export for App Router: Static / Single-Page Application (SPA) support for Server Components. Parallel Routes and Interception: Advanced',
    'metadata': {
      'id': '6c8d1a7b-ea34-4927-8823-daa29dcfc5a1',
      'uniqueLoaderId': '6c8d1a7b-ea34-4927-8823-xba29dcfc5ae',
      'source': 'https://nextjs.org/blog/next-13-3'
    }
  },
  {
    'score': 0.98,
    'pageContent': 'Upgrading: Version 14 | Next.js MenuUsing App RouterFeatures available in /appApp Router.UpgradingVersion 14Version 14 Upgrading from 13 to 14 To update to Next.js version 14, run the following command using your preferred package manager: Terminalnpm i next@latest react@latest react-dom@latest eslint-config-next@latest Terminalyarn add next@latest react@latest react-dom@latest eslint-config-next@latest Terminalpnpm up next react react-dom eslint-config-next -latest Terminalbun add next@latest',
    'metadata': {
      'id': '6c8d1a7b-ea34-4927-8823-daa29dcfc5a2',
      'uniqueLoaderId': '6c8d1a7b-ea34-4927-8823-xba29dcfc5ad',
      'source': 'https://nextjs.org/docs/app/building-your-application/upgrading/version-14'
    }
  }
]*/
```

The `source` key contains the url of the document that yielded that document chunk.

If you are interested in configuring the search further, refer to our [API documentation](/api-reference/pipeline/search).

***

This guide will help you swiftly set up a semantic search pipeline with EmbedJs, making it easier to access and analyze specific information from large data sources.

## Need help?

In case you run into issues, feel free to contact us via any of the following methods:

<Snippet file="get-help.mdx" />