How to search data dictionary for interval partitions?

Question

Oracle 11.2.0.3
When I query DBA_PART_TABLES.PARTITIONING_TYPE it says 'range'. I want to be able to differential an interval from other range based partitions in the data dictionary?
used this example. shows 'range'
http://www.rittmanmead.com/2008/09/investigating-oracle-11g-interval-partitioning/
Oracle Docs list 'SYSTEM' as a partitioning_type which I thought would be intervals.
ALL_PART_TABLES
[code]
  1   CREATE TABLE interval_sales
  2          ( prod_id        NUMBER(6)
  3          , cust_id        NUMBER
  4          , time_id        DATE
  5          , channel_id     CHAR(1)
  6          , promo_id       NUMBER(6)
  7          , quantity_sold  NUMBER(3)
  8          , amount_sold    NUMBER(10,2)
  9          )
10       PARTITION BY RANGE (time_id)
11       INTERVAL(NUMTOYMINTERVAL(1, 'MONTH'))
12         ( PARTITION p0 VALUES LESS THAN (TO_DATE('1-1-2005', 'DD-MM-YYYY')),
13           PARTITION p1 VALUES LESS THAN (TO_DATE('1-1-2006', 'DD-MM-YYYY')),
14           PARTITION p2 VALUES LESS THAN (TO_DATE('1-7-2006', 'DD-MM-YYYY')),
15*          PARTITION p3 VALUES LESS THAN (TO_DATE('1-1-2007', 'DD-MM-YYYY')) )
SQL>/
Table created.
Elapsed: 00:00:00.01
SQL> select partitioning_type from user_part_tables where table_name = 'INTERVAL_SALES';
PARTITION
RANGE
[/code]

Answer 1

CREATE TABLE junk1
   ( id         NUMBER )
   PARTITION BY RANGE (id)
   INTERVAL(5)
     ( PARTITION p0 VALUES LESS THAN (5),
       PARTITION p1 VALUES LESS THAN (10),
       PARTITION p2 VALUES LESS THAN (15),
       PARTITION p3 VALUES LESS THAN (20) )
CREATE TABLE junk2
   ( id         NUMBER )
   PARTITION BY RANGE (id)
     ( PARTITION p0 VALUES LESS THAN (5),
       PARTITION p1 VALUES LESS THAN (10),
       PARTITION p2 VALUES LESS THAN (15),
       PARTITION p3 VALUES LESS THAN (20) )
select owner, table_name, partitioning_type, interval
  from dba_part_tables
where table_name in ('JUNK1', 'JUNK2')
OWNER                          TABLE_NAME                     PARTITIONING_TYPE INTERVAL           
GREGS                          JUNK1                          RANGE             5                  
GREGS                          JUNK2                          RANGE                 
2 rows selected.