The Bing Shopping Category Taxonomy and category list can be found here.
There are around five thousand Bing Shopping categories. Bing categories are specific and will only accept a valid predefined Bing taxonomy value from the Bing product taxonomy list. Partial paths for categories are not acceptable. Full paths must be used. For example, “Baby and Nursery | Baby Activities | Swings” is valid while “Swings” or “Baby and Nursery” alone is invalid.
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