Specialized attributes are designed to change the aspects of a Magento product, that is not a normal attribute. Those aspects can be for example 'amount in stock', 'assign new category', 'remove category', 'assign related products', 'clean up related products'.

Most of those 'specialized attributes' work only on products, that are already inserted into the Magento store. So if you wish to insert new products with those 'specializations' then you need to process the file twice.