> For the complete documentation index, see [llms.txt](https://docs.mindee.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mindee.com/v1/integration/ruby-sdk/localized-products/ruby-us-us-mail-ocr.md).

# US US Mail

The Ruby Client Library supports the [US Mail API](https://platform.mindee.com/mindee/us_mail).

## Product Specifications

| Specification                  | Details            |
| ------------------------------ | ------------------ |
| Endpoint Name                  | `us_mail`          |
| Recommended Version            | `v3.0`             |
| Supports Polling/Webhooks      | ✔️ Yes             |
| Support Synchronous HTTP Calls | ❌ No               |
| Geography                      | 🇺🇸 United States |

## Quick-Start

Using the [sample below](https://github.com/mindee/client-lib-test-data/blob/main/v1/products/us_mail/default_sample.jpg), we are going to illustrate how to extract the data that we want using the SDK.

<figure><img src="https://github.com/mindee/client-lib-test-data/blob/main/v1/products/us_mail/default_sample.jpg?raw=true" alt="US Mail Sample" width="375"><figcaption></figcaption></figure>

### Sample Code

```rb
#
# Install the Ruby client library by running:
# gem install mindee
#

require 'mindee'

# Init a new client
mindee_client = Mindee::Client.new(api_key: 'my-api-key')

# Load a file from disk
input_source = mindee_client.source_from_path('/path/to/the/file.ext')

# Parse the file
result = mindee_client.parse(
  input_source,
  Mindee::Product::US::UsMail::UsMailV3
)

# Print a full summary of the parsed data in RST format
puts result.document

# Print the document-level parsed data
# puts result.document.inference.prediction
```

### Sample Output (rST)

```rst
########
Document
########
:Mindee ID: f9c36f59-977d-4ddc-9f2d-31c294c456ac
:Filename: default_sample.jpg

Inference
#########
:Product: mindee/us_mail v3.0
:Rotation applied: Yes

Prediction
==========
:Sender Name: company zed
:Sender Address:
  :City: Dallas
  :Complete Address: 54321 Elm Street, Dallas, Texas 54321
  :Postal Code: 54321
  :State: TX
  :Street: 54321 Elm Street
:Recipient Names: Jane Doe
:Recipient Addresses:
  +-----------------+-------------------------------------+-------------------+-------------+------------------------+-------+---------------------------+-----------------+
  | City            | Complete Address                    | Is Address Change | Postal Code | Private Mailbox Number | State | Street                    | Unit            |
  +=================+=====================================+===================+=============+========================+=======+===========================+=================+
  | Detroit         | 1234 Market Street PMB 4321, Det... | False             | 12345       | 4321                   | MI    | 1234 Market Street        |                 |
  +-----------------+-------------------------------------+-------------------+-------------+------------------------+-------+---------------------------+-----------------+
:Return to Sender: False
```

## Standard Fields

These fields are generic and used in several products.

### Basic Field

Each prediction object contains a set of fields that inherit from the generic `Field` class. A typical `Field` object will have the following attributes:

* **value** (`String`, `Float`, `Integer`, `bool`): corresponds to the field value. Can be `nil` if no value was extracted.
* **confidence** (Float, nil): the confidence score of the field prediction.
* **bounding\_box** (`Mindee::Geometry::Quadrilateral`, `nil`): contains exactly 4 relative vertices (points) coordinates of a right rectangle containing the field in the document.
* **polygon** (`Mindee::Geometry::Polygon`, `nil`): contains the relative vertices coordinates (`Point`) of a polygon containing the field in the image.
* **page\_id** (`Integer`, `nil`): the ID of the page, always `nil` when at document-level.
* **reconstructed** (`bool`): indicates whether an object was reconstructed (not extracted as the API gave it).

Aside from the previous attributes, all basic fields have access to a `to_s` method that can be used to print their value as a string.

### String Field

The text field `StringField` only has one constraint: it's **value** is a `String` (or `nil`).

## Specific Fields

Fields which are specific to this product; they are not used in any other product.

### Sender Address Field

The address of the sender.

A `UsMailV3SenderAddress` implements the following attributes:

* `city` (String): The city of the sender's address.
* `complete` (String): The complete address of the sender.
* `postal_code` (String): The postal code of the sender's address.
* `state` (String): Second part of the ISO 3166-2 code, consisting of two letters indicating the US State.
* `street` (String): The street of the sender's address. Fields which are specific to this product; they are not used in any other product.

### Recipient Addresses Field

The addresses of the recipients.

A `UsMailV3RecipientAddress` implements the following attributes:

* `city` (String): The city of the recipient's address.
* `complete` (String): The complete address of the recipient.
* `is_address_change` (bool): Indicates if the recipient's address is a change of address.
* `postal_code` (String): The postal code of the recipient's address.
* `private_mailbox_number` (String): The private mailbox number of the recipient's address.
* `state` (String): Second part of the ISO 3166-2 code, consisting of two letters indicating the US State.
* `street` (String): The street of the recipient's address.
* `unit` (String): The unit number of the recipient's address.

## Attributes

The following fields are extracted for US Mail V3:

### Return to Sender

**is\_return\_to\_sender** ([BooleanField](#boolean-field)): Whether the mailing is marked as return to sender.

```rb
puts result.document.inference.prediction.is_return_to_sender.value
```

### Recipient Addresses

**recipient\_addresses** (Array<[UsMailV3RecipientAddress](#recipient-addresses-field)>): The addresses of the recipients.

```rb
result.document.inference.prediction.recipient_addresses do |recipient_addresses_elem|
  puts recipient_addresses_elem.value
end
```

### Recipient Names

**recipient\_names** (Array<[StringField](#string-field)>): The names of the recipients.

```rb
result.document.inference.prediction.recipient_names do |recipient_names_elem|
  puts recipient_names_elem.value
end
```

### Sender Address

**sender\_address** ([UsMailV3SenderAddress](#sender-address-field)): The address of the sender.

```rb
puts result.document.inference.prediction.sender_address.value
```

### Sender Name

**sender\_name** ([StringField](#string-field)): The name of the sender.

```rb
puts result.document.inference.prediction.sender_name.value
```


---

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