modifiing string based on other nodes

hai everybody
I just got one problem and can anybody solve it: 

here is the sample xml file:


1.<Property>
2.<Label>Dbms Data Type</Label>
3.<PermanentName>S_LDD_DBMS_DATA_TYPE</PermanentName>
4.<Value DataType="STRING">NUMBER</Value>      
5.</Property>
6.<Property>
7.<Label>Dbms Data Type Length</Label>
8.<PermanentName>S_LDD_LEN</PermanentName>
9.<Value DataType="INTEGER">4</Value>
10.</Property>
11.<Property>
12.<Label>Data Storage Precision</Label>
13.<PermanentName>S_LDD_PRECISION</PermanentName>
14.<Value DataType="INTEGER">0</Value>
15.</Property>

what i want is:
<PermanentName>S_LDD_DBMS_DATA_TYPE</PermanentName>
<Value DataType="STRING">NUMBER</Value>,which is there
in the line number4 of above xml file to be


<PermanentName>S_LDD_DBMS_DATA_TYPE</PermanentName>
<Value DataType="STRING">SMALL INTEGER<value>
------NUMBER SHOULD BECOME SMALL INTEGER ONLY IF

<Value DataType="INTEGER">4</Value>---- value is less
than 4
<PermanentName>S_LDD_PRECISION</PermanentName>
<Value DataType="INTEGER">0</Value>------  precision
of 0

<PermanentName>S_LDD_DBMS_DATA_TYPE</PermanentName>
<Value DataType="STRING">INTEGER<value> ------NUMBER
SHOULD BECOME INTEGER ONLY IF

<Value DataType="INTEGER">4</Value>---- value is
between 4 and  15
<PermanentName>S_LDD_PRECISION</PermanentName>
<Value DataType="INTEGER">0</Value>------ precision of
zero

<PermanentName>S_LDD_DBMS_DATA_TYPE</PermanentName>
<Value DataType="STRING">BIGINT<value> ------NUMBER
SHOULD BECOME BIGINT ONLY IF 

<Value DataType="INTEGER">4</Value>---- value is
greater than 15
<PermanentName>S_LDD_PRECISION</PermanentName>
<Value DataType="INTEGER">0</Value>---- precision of
zero


<PermanentName>S_LDD_DBMS_DATA_TYPE</PermanentName>
<Value DataType="STRING">DECIMAL<value> ------NUMBER
SHOULD BECOME DECIMAL ONLY IF

<Value DataType="INTEGER">4</Value>----  value is 
greater than 15
<PermanentName>S_LDD_PRECISION</PermanentName>
<Value DataType="INTEGER">0</Value>----which has got a
precision of 1 or 2


  
  
  



THANKS in advance
GURU
Satyam Computer Services









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