Assertion: manufacturer's product | /r/HasAspect | gtin
Facets:
Source sentences:
text: The gtin attribute is required if the product is widely manufactured and has a GTIN.
text: For all widely manufactured products (which are submitted with the condition attribute) that have a GTIN assigned, submit the following attributes:
text: Some products don’t have a GTIN assigned, and so you don’t need to submit one.
text: However, if the product does have a GTIN assigned and you don’t submit it, the product’s performance may be limited.