While Prestashop does use a unique numerical autonumber to identify products (ps_product.id_product
), there are also three fields into which you could provide external references - Reference Code, EAN-13 or JAN Barcode, and UPC Barcode, though it is apparent the Reference Code field (ps_product.reference
) would be the most appropriate and does not have any validation other than to limit the acceptable characters to alphanumerics and special characters .-_#\
.
Since this question was asked some time ago I'm not sure which version of Prestahop @stighy would have had installed and be referring to, however having checked I can confirm that this reference field was present in v1.4.11.0 and is still present in v1.6.0.14.