A REST service has a collection of different endpoints that service consumers can access to get various data/functionality from the REST resources of the REST service.
These endpoints are simple URLs to these REST resources combined with an HTTP method/verb (i.e. GET, POST, PUT, DELETE, etc).
Each endpoint belonging to this REST service must be preceded by the base URL: http://rest.bioontology.org/resource_index
For more information on REST services, please visit
http://en.wikipedia.org/wiki/Representational_State_Transfer