tokens: ['over', 'SEALC', 'reference', 'points', 'The', 'VAL', 'servers', 'communicate', 'with', 'the', 'SEAL', 'servers', 'over', 'the', 'SEALS', 'reference', 'points', 'The', 'SEAL', 'servers', 'may', 'communicate', 'with', 'the', 'underlying', 'GPP', 'network', 'systems', 'using', 'the', 'respective', 'GPP', 'interfaces', 'specified', 'by', 'the', 'GPP', 'network', 'system', '', 'The', 'functional', 'model', 'for', 'interconnection', 'between', 'SEAL', 'servers', 'to', 'support', 'distributed', 'SEAL', 'server', 'deployments', 'the', 'SEAL', 'server', 'interacts', 'with', 'another', 'SEAL', 'server', 'for', 'the', 'same', 'SEAL', 'service', 'over', 'SEALE', 'reference', 'point', 'as', 'shown', 'in', 'the', 'figure', 'below', '', 'The', 'functional', 'model', 'for', 'interservice', 'communication', 'between', 'SEAL', 'servers', 'to', 'support', 'the', 'SEAL', 'server', 'interaction', 'with', 'another', 'SEAL', 'server', 'for', 'interservice', 'communication', 'over', 'SEALX', 'reference', 'point', 'is', 'shown', 'in', 'the', 'figure', 'below', '', 'The', 'functional', 'architecture', 'of', 'each', 'SEAL', 'service', 'listed', 'below', 'and', 'corresponding', 'functional', 'entities', 'and', 'reference', 'points', 'along', 'with', 'the', 'procedures', 'and', 'information', 'flows', 'northbound', 'APIs', 'to', 'expose', 'the', 'SEAL', 'services', 'to', 'the', 'vertical', 'applications', 'in']