There is the task to create a custom product attribute that controls the display of a message below the product title on the cart page, in order to identify products that might be delivered late.
The new EAV attribute is_delayed has been created as a boolean and is working correctly in the admin panel and product page.
What would be the next implementation to allow the is_delayed EAV attribute to be used in the .phtml cart page such as $block->getProduct()->getIsDelayed()?
A)
Create a new file etc/catalog_attributes.xmi:

B)
Create a new file etc/extension attributes.xmi:

C)
Create a new file etc/eav attributes.xmi:

Correct Answer: A
To allow the is_delayed EAV attribute to be used in the .phtml cart page, the developer needs to create a new file called etc/catalog_attributes.xmi. This file will contain the definition of the is_delayed attribute.
The following code shows how to create the etc/catalog_attributes.xmi file:
XML
<?xml version="1.0"?>
<catalog_attributes>
<attribute code="is_delayed" type="int">
<label>Is Delayed</label>
<note>This attribute indicates whether the product is delayed.</note>
<sort_order>10</sort_order>
<required>false</required>
</attribute>
</catalog_attributes>
Once the etc/catalog_attributes.xmi file has been created, the is_delayed attribute will be available in the .
phtml cart page. The attribute can be accessed using the getIsDelayed() method of the Product class.
PHP
$product = $block->getProduct();
$isDelayed = $product->getIsDelayed();
The isDelayed variable will contain the value of the is_delayed attribute. If the value of the attribute is 1, then the product is delayed. If the value of the attribute is 0, then the product is not delayed.