Required for each product.
id should be unique for every product and not be changed or re-used for other products, a good practice is to use SKUs as ids as SKUs also are unique.
Must be case-insensitive (Meaning abc123 will be the same as ABC123)
No whitespace allowed
Limit: maximum 36 characters
Numbers, letters (case insensitive), dash (-) and underscore (_)
Value must be unique
XML syntax examples
CSV syntax examples
id must be unique (If not unique, your product will be indexed incorrectly)
id must be case-insensitive (Casing will not make IDs unique, abc123 = ABC123)
id cannot be re-used (If re-used, your product might end up indexed to the wrong Prisjakt product)
id cannot change (If changed, the product will need to be indexed again)
id must follow UTF-8 specs