Bert for token classification

BERT Tagging

1. Inside–outside–beginning (tagging) : The IOB (short for inside, outside, beginning) is a common tagging format for tagging tokens.

• I- prefix before a tag indicates that the tag is inside a chunk.
• B- prefix before a tag indicates that the tag is the beginning of a chunk.
• An O tag indicates that a token belongs to no chunk (outside).

2. Tagging:

• geo = Geographical Entity
• org = Organization
• per = Person
• gpe = Geopolitical Entity
• tim = Time indicator
• art = Artifact
• eve = Event
• nat = Natural Phenomenon