Thread: assign values to nodes read from XML using java

i am trying to assign unique values to nodes read from XML file.. eg: consider this XML file:

 
<breakfast_menu>
   <food>
      <name>Belgian Waffles</name>
      <price>$5.95</price>
      <description> ...Strong Belgian waffles...</description>
      <calories>650</calories>
      <chef type="Senior">
           <chef1>Mr. A</chef1>
           <chef2>Mr. B</chef2>
      </chef>
   </food>
   <food>
      <name>Strawberry Waffles</name>
      <price>$7.95</price>
      <description>...Light Strawberry waffles...</description>
      <calories>900</calories>
      <chef type="Senior">
           <chef1>Mr. A</chef1>
           <chef2>Mr. B</chef2>
      </chef>
  </food>
<breakfast_menu>

now assigning these nodes "a unique value" has to be done following the LSDX labelling pattern i.e:

To the document element we first give an “a”.As there is no parent node for the document element, we assign “0” at the front of that “a” . “0a” is the unique code for the document element (breakfast_menu). For the children nodes of “0a”, we continue with the next level of the XML tree which is “1” then the code of its parent node which is “a” and a concatenation “.” . We then add a letter “b” for the first child, letter “c” for the second child, “d” for the third child and so on.Unique codes for children nodes of “0a” shall be “1a.b”, “1a.c”, “1a.d”, etc.Hence foe the above given XML the mapping would look something like this:

0a breakfast_menu
    1a.b food
       2ab.b name
       2ab.c price
       2ab.d description
       2ab.e calories
       2ab.f chef
          3abf.b chef1
          3abf.c chef2        
    1a.c food
       2ac.b name
       2ac.c price
       2ac.d description
       2ac.e calories
       2ac.f chef 
          3acf.b chef1
          3acf.c chef2

For more samples about LSDX labelling : 1.) Section 3.1 LSDX Labelling on this link: http://crpit.com/confpapers/CRPITV39Duong.pdf

2.) Fig 3 on page 1189 on this link: http://books.google.co.in/books?id=F...0nodes&f=false

right now i am using SAX parser to read xml and get the nodes in their hierarchical order..now the problem is that i have to assign these specific value to their respective nodes using java..can any1 help me out as to how to do this..