
CREATE TABLE refObj (
    source varchar(255),
    h_occurrence varchar(255),
    h_position varchar(255),
    h_depth integer
);
CREATE TABLE refSort (
    source varchar(255),
    h_position varchar(255),
    h_depth integer,
    h_sort varchar(255)
);
CREATE TABLE refRel (
    source varchar(255),
    h_position varchar(255),
    h_depth integer
);
CREATE TABLE objectName (
    source varchar(255),
    value varchar(255)
);

CREATE INDEX refObj_source ON refObj (source);
CREATE INDEX refObj_target ON refObj (h_occurrence);
CREATE INDEX refSort_source ON refSort (source);
CREATE INDEX objectName_value ON objectName (value);

