> For the complete documentation index, see [llms.txt](https://docs.caf.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.caf.io/caf-sdk/ios/standalone-modules/document-detector/builder.md).

# Setting up the SDK

First, instantiate an object of type **`DocumentDetectorSdk`**:

```swift
let documentDetector = DocumentDetectorSdk.CafBuilder(mobileToken: "mobileToken")
    // see table bellow
    .build()
```

{% hint style="info" %}
We recommend paying special attention to the SDK implementation for low-end devices. For better performance and user experience, consider using the document upload flow instead of the capture mode.
{% endhint %}

{% hint style="info" %}
Another point of attention: please note that the automatic document capture option is only available for devices with iOS 13+. Below this version, the SDK will only enable the manual document capture option.
{% endhint %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.caf.io/caf-sdk/ios/standalone-modules/document-detector/builder.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.