Figure 5.

Using the ontology server. The user searches the Unified Medical Language System (UMLS) for terms beginning with “pyramidal.” A list of matching terms is returned (EN in the figure indicates that the term is in English). Clicking on Pyramidal Cells shows details (taken from UMLS's MRDEF table) as well as local objects mapped to that concept. Clicking on the hyperlink associated with the second row (o265 is the unique internal identification of the object) takes the user to details of the neocortical pyramidal neuron within SenseLab. One may then inspect additional information on the neuron, such as the receptors and currents associated with individual compartments in the neuron, by clicking on further hyperlinks (details not shown). This query involves all three types of servers: the ontology server provides access to the UMLS and also replicates the mapping of objects in local databases to UMLS concepts: the integrator server actually mediates the query that fetches information from SenseLab (by making a request of SenseLab's data source).