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holub008 | 3 years ago

Content tagging in online systems has existed since at least the 1970s, with the earliest example I can think of being MEDLINE https://en.wikipedia.org/wiki/MEDLINE

discuss

joshu|3 years ago

metadata is not is tagging. keywords are not tagging.

holub008|3 years ago

Right, MEDLINE's "tagging" system is MeSH, which is a large controlled vocabulary. MEDLINE does contain bibliographic data + journal keywords, but its real value add is MeSH, which is used for search, related publication identification, etc. in PubMed.

https://en.wikipedia.org/wiki/Medical_Subject_Headings