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I am trying to figure out how the linkage between attribute and attribute options, and product and attributes are made in Magento. Is there any reference to how this is working? or anyone give me a hint on this.
Thanks,
Balan
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An attribute is a property of a product, for example, the product color, the size, or the description. Some attributes are built into the system by default, and others can be created to address specific needs. You can add, edit, or remove product attributes in Magento 2 to customize your products.
Product attributes are stored in two locations - in wp_terms, wp_term_taxonomy and wp_term_relationships (that's the first place - each attribute is preceded by pa_ for its taxonomy name - e.g. if you have a color attribute, it's under pa_color) then also as a PHP serialized array in wp_postmeta under '_ ...
As Alan Storm says: "you do not have to know about how your db works. You have to learn how the models work ". (This is not an exact quote. I gave you the meaning).
But I created own scheme to understand the DB structure. So this screen shows how it works: 
Hope, it helps.
Also I recommend you to look through these links:
http://www.magentocommerce.com/wiki/2_-_magento_concepts_and_architecture/magento_database_diagram
http://alanstorm.com/magento_advanced_orm_entity_attribute_value_part_1
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