CREATE TABLE crossdict (
  url_id int4 DEFAULT '0' NOT NULL,
  ref_id int4 DEFAULT '0' NOT NULL,
  intag  int4 DEFAULT '0' NOT NULL,
  word   text DEFAULT '0' NOT NULL
);

CREATE INDEX crossdict_url_id ON crossdict (url_id);
CREATE INDEX crossdict_ref_id ON crossdict (ref_id);
CREATE INDEX crossdict_word ON crossdict (word);
CREATE INDEX crossdict_word_url_id ON crossdict (word, url_id);