-uint64_t sequence_len(struct definition_sequence *sequence);
-struct definition *sequence_index(struct definition_sequence *sequence, uint64_t i);
-int sequence_rw(struct stream_pos *pos, struct definition *definition);
+uint64_t bt_sequence_len(struct definition_sequence *sequence);
+struct definition *bt_sequence_index(struct definition_sequence *sequence, uint64_t i);
+int bt_sequence_rw(struct stream_pos *pos, struct definition *definition);