create table services (
  name text not null,
  version text not null,
  state text references service_states not null,
  type text references service_types not null default 'public',
  uri text not null,
  title text,
  description text
);
comment on table services is '
  A single available service.
';

comment on column services.uri is '
  URI under which this service is deployed.
';
comment on column services.title is '
  A human-readable title of the service.
';
comment on column services.description is '
  A human-readable description of the service.
';