Splitting text column into sections

Question

(Using Oracle 9i SQL)
I need to be able to split text which may be from 0 to 2000 bytes into sections of no more than 10 characters and assign a sequence to each. As usual, example is the best way to illustrate.
The following presents the "raw" data:
with src as (
select     'A100000'     part_no,
     'Short'          descr
from     dual
UNION ALL
select 'A100001','two words' from dual
UNION ALL
select 'A100002','Should be two lines' from dual
UNION ALL
select 'A100003','This is going to be 3' from dual
UNION ALL
select 'A100004','Oneverylongword' from dual
UNION ALL
select 'A100005','Perfectfit' from dual
UNION ALL
select 'A100006','' from dual
UNION ALL
select 'A100007','A Perfectfit but 3 lines' from dual
UNION ALL
select 'A100008','Toolongforone' from dual
UNION ALL
select 'A100009','Toolongforone too' from dual
select     part_no,
     descr
from     src
PART_NO DESCR
A100000 Short
A100001 two words
A100002 Should be two lines
A100003 This is going to be 3
A100004 Oneverylongword
A100005 Perfectfit
A100006
A100007 A Perfectfit but 3 lines
A100008 Toolongforone
A100009 Toolongforone too
10 rows selected.What I want is this kind of thing:
PART_NO DESCR                           SEQ TEXT
A100000 Short                             1 Short
A100001 two words                         1 two words
A100002 Should be two lines               1 Should be
A100002 Should be two lines               2 two lines
A100003 This is going to be 3             1 This is
A100003 This is going to be 3             2 going to
A100003 This is going to be 3             3 be 3
A100004 Oneverylongword                   1 Oneverylon
A100004 Oneverylongword                   2 gword
A100005 Perfectfit                        1 Perfectfit
A100006                                   0
A100007 A Perfectfit but 4 lines          1 A
A100007 A Perfectfit but 4 lines          2 Perfectfit
A100007 A Perfectfit but 4 lines          3 but 4
A100007 A Perfectfit but 4 lines          4 ines
A100008 Toolongforone                     1 Toolongfor
A100008 Toolongforone                     2 one
A100009 Toolongforone too                 1 Toolongfor
A100009 Toolongforone too                 2 one too

Answer 1

Thanks although there is a bug when the text is too big:
with src as (
select     'Alen0000'     id,
     'Short'          str
from     dual
UNION ALL
select 'Alen0001','two words' from dual
UNION ALL
select 'Alen0002','Should be two lines' from dual
UNION ALL
select 'Alen0003','This is going to be 3' from dual
UNION ALL
select 'Alen0004','Oneverylongword' from dual
UNION ALL
select 'Alen0005','Perfectfit' from dual
UNION ALL
select 'Alen0006','' from dual
UNION ALL
select 'Alen0007','A Perfectfit but 3 lines' from dual
UNION ALL
select 'Alen0008','Toolongforone' from dual
UNION ALL
select 'Alen0009','Toolongforone too' from dual
SELECT
     ID, STRING
FROM
     (SELECT    
          ID, LEVEL level#,
          SUBSTR (str, INSTR (str, base, 1, LEVEL) + len,
               INSTR (SUBSTR (str, INSTR (str, base, 1, LEVEL) + len, limit# + 1),
                    base, -1) -1) STRING,
        INSTR (str, base, 1, LEVEL) + len - 1 start#,
        INSTR (SUBSTR (str, INSTR (str, base, 1, LEVEL) + len, limit# + 1), base, -1)
               + INSTR (str, base, 1, LEVEL) + len - 1 end#
     FROM
          (SELECT
               ROWNUM ID, ' ' base, ' ' || str || ' ' str, LENGTH (' ') len, 10 limit#
          FROM src
     CONNECT BY LEVEL <= (length (str) - length (REPLACE (str, base))) / len - 1
START WITH start# = 1
CONNECT BY PRIOR end# = start# and prior ID=ID
  GROUP BY ID, level#, STRING
/ERROR at line 4:
ORA-01436: CONNECT BY loop in user data
yet is I change limit from 10 to 15 it is OK