24. Onward

If you get stuck or a query runs forever, the operators are usually happy to help you. To find out who could be there to help you, use – the relational registry. If you have the IVORN of the service, use

SELECT role_name, email, base_role
FROM rr.res_role
WHERE ivoid='ivo://org.gavo.dc/__system__/tap/run'

– if all you have is the access URL, do a natural join with interfaces.

Left to the reader as an exercise

Hendrik Heinl

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