text: SBO is currently made up of seven different vocabularies:
  * systems description parameter (catalytic constant, thermodynamic temperature...)
  * participant role (substrate, product, catalyst...)
  * modelling framework (discrete, continuous...)
  * mathematical expression (mass-action rate law, Hill-type rate law...)
  * occurring entity representation (biochemical process, molecular or genetic interaction...)
  * physical entity representation (transporter, physical compartment, observable...)
  * metadata representation (annotation)