Query for an array of objects whose class name is specified and one of whose property values should be matched for the specified values. Get a list of Objects by specifying a class name and its start index and the total length for the list. Get the list of all top level pathways. A top level pathway is a pathway that is not contained by another pathway in the hierarchical tree. Query for an object by specifying a DB_ID. Query for an object by specifying an Object. This Object should have id specified. Generat a SVG diagram for the specified Pathway object. The diagram is generated by using dot from the graphviz package. Generat a SVG diagram for the specified Pathway id. The diagram is generated by using dot from the graphviz package.