Access the existing classifications by DOI, or create your own with the simple to use API. Group microtopics into ontologies such as Fields of Research or Sustainable Development Goals.

The global distribution of blood types varies widely ... The newly discovered MAL blood group system, however, is exceptionally rare. Research indicates that more than 99.9 per cent of people ...

Discontinuous variation refers to things like eye colour or blood group, which have a limited number of possible values. In other words, a person's blood can be A, B, AB or O, but it can't be ...