How to import goods and trade offers to Bitrix?

Question

1C-Bitrix

Understood like with the import of goods correct, if not so?
yes:
название|цена|фото1, фото2|размер1, размер2
to import into a catalog, you need to decompose into 4 lines

название|цена|фото1|размер1
название|цена|фото1|размер2
название|цена|фото2|размер1
название|цена|фото2|размер2

then we will get a product with photos and sizes in the product properties, but not the ability to select a size, in order to get the size it is necessary to import into trade offers but with reference to the main product ID from the catalog
Question, how to upload new products if the ID is known only after uploading to the catalogs? And how then to update the prices if in any way? )

Answer 1

I think not quite on your question, but in case someone needs to simulate uploading data to Bitrix from 1C, here is a link on the site - blog.ivru.net/?id=1 here it is described in stages how this procedure looks like.
Useful for those who do not have 1s installed, while there is a file downloaded from 1s that needs to be uploaded.