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With add-ons, you can specify products that can be bought as an addition to this product. For example,
if
you host a conference with a base conference ticket and a number of workshops, you could define the
workshops as add-ons to the conference ticket. With this configuration, the workshops cannot be bought
on their own but only in combination with a conference ticket. You can here specify categories of
products
that can be used as add-ons to this product. You can also specify the minimum and maximum number of
add-ons of the given category that can or need to be chosen. The user can buy every add-on from the
category at most once. If an add-on product has multiple variations, only one of them can be bought.
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