In the API documentation we use:

• mainly "tag"/"tags":
  • "Product Tags List"
  • "Product Tag"
  • "Product Tag Delete"
  • etc.
• "k" and "v", with no explication of their meaning (=> key, value)

Tag, key/value

In the general public, a tag is only a keyword, not a combination of a property and a value. This meaning is shared by:

• hashtags
• microformats (where the rel-tag property is for decentralized tagging (Folksonomy) (source Wikipedia))

The OpenStreetMap community is using the "tag" term: A tag consists of two items, a key and a value (source). But OpenStreetMap mappers are often techies who know what is key and a value. A key is probably not very instinctive for Open Food Facts contributors.

Pros:

• already use in OpenStreetMap community

Cons:

• how to create simple tags (eg. (k="tag" and v="tobedeled") if the "tag" term is already used for the whole key/value pair?

Pair (or triple or triple tag), property, value

Pros:

• property and value are easy to understand for the general public
• these notions are used by the semantic web community
• "tag" can be a property to allow simple tags (Eg. "tag" => "to be deleted")

Cons:

• the name of the property/value pair is not very clear: a pair? a triple (like in the semantic web community)

Other?