I have add the one custom dialog in inkscape . In that i provide the on
radio button  that we mention the object priority

Now my svg file save like
<g inkscape:label="Layer 1" inkscape:groupmode="layer" id="layer1">
   <path d="M 77.14286,498.07648 L 368.57142,498.07648 L 368.57142,692.3622 L 77.14286,692.3622 z" id="rect3097" Priority="4" />
  <path d="M 477.14285,615.2193 L 620,615.2193 L 620,749.50502 L 477.14285,749.50502 z" id="rect3103" Priority="1" />
 </g>

Now i want to save svg file in ascending order  ,  ascending  operation in Priority value  , After ascending svg file i want to save file like that i mention below
<g <path d="M 477.14285,615.2193 L 620,615.2193 L 620,749.50502 L 477.14285,749.50502 z" id="rect3103" Priority="1" />
 <path d="M 77.14286,498.07648 L 368.57142,498.07648 L 368.57142,692.3622 L 77.14286,692.3622 z" id="rect3097" Priority="4" />
</g>


For that i write custom code when user select Object Path .In "sp_item_list_to_curves" function  i do ascending operation in Priority value . after that i can get the Priority  values in ascending order ..
But when i save the file in svg format i can't get output what i want actually..!!
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