Editing Magento (section)

==Object Model==
* Stock Keeping Unit (SKU), dedicated product id within a shop
===AbstractCarrier===
* \Magento\Shipping\Model\Carrier\
* Base class for shipping with major methods for shipping models.

===AbstractDb===
* \Magento\Framework\Model\ResourceModel\Db\
* [[Magento#Persistance_Layer|resource model]] base class

===AbstractEntity===
* \Magento\Eav\Model\Entity\
* [[Magento#Persistance_Layer|EAV resource model]] base class
===AbstractModel===
* AbstractModel
* \Magento\Framework\Model\
* [[Magento#Persistance_Layer|EAV model]] base class

===Attribute===
* table 'eav_attribute'
* ???system attributes are by default part of every attribute set

===Attribute Group===
* combination of attributes e.g. to group them on a tab in backend
* table 'eav_attribute_group'

===Attribute Set===
* set of attribute groups ([https://docs.magento.com/m2/ce/user_guide/stores/attribute-sets.html see in official documentation])
* the default attribute set is something like the factory proposal, but you can even add attributes to the default w/o creating a new set
* table 'eav_attribute_set'

===CustomerSetup===
* \Magento\Customer\Setup
* extends [[Magento#EavSetup|EavSetup]]

===DataObject===
* Magento\Framework\
* [[Magento#Presentation_Layer|model]] base class
* Extension don't have to implement getter- and setter-, unset- and has-methods, DataObject implements getXYZ() and setXYZ() by overriding the PHP __call magic method

===EavSetup===
* Magento\Eav\Setup\

====addSetup()====
* type: which eav table is used
* label: label in admin area
* input: input type
* required: 
* sort_order: in admin area
* globe: scope
* wysiwyg_enabled:
* is_html_allowed_on_front

===Exception===
* \Magento\Framework\

===LocalizedException===
* Magento\Framework\Exception\
* The ctor expects as a first parameter a Magento\Framework\Phrase object which can be created by the __() function defined in \app\functions.php and which is used to JSONize the information.

===Mysql===
* Magento\Framework\DB\Adapter\Pdo\Mysql
* extends \Zend_Db_Adapter_Pdo_Mysql implements AdapterInterface

===RateRequest===
* Magento\Quote\Model\Quote\Address\
* This class contains all information about items in cart/quote, weight, shipping address and so on.

===SalesSetup===
* Magento\Sales\Setup
* extends [[Magento#EavSetup|EavSetup]]