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1. https://github.com/Arcath/post-formats/blob/master/post-formats.php

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2. Products are located mainly in 2 tables:

   wp_posts table with a post_type product or product_variation,
   wp_postmeta table with the corresponding post_id by product (the product ID).

   Product types, categories, subcategories, tags, attributes and all other custom taxonomies for particular products are located in the tables below:

   wp_terms
   wp_termmeta
   wp_term_taxonomy
   wp_term_relationships
   wp_woocommerce_termmeta
   wp_woocommerce_attribute_taxonomies (for product attributes only)

   Product types are handled by custom taxonomy product_type with the following default terms:

   simple
   grouped
   variable
   external

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