xml - HP UX insert text to specific location -

I have a text file in HPUX and put me in some XML file in a specific location, for example, I After some text must be inserted

  & lt; Table name = "data" key = "CONTEXT_ID, USERNAME" & gt; ... my text here in   
 I did this through 'sed' in Linux but in the same order there is an error in the huux, unable to parse ...  
 Please  
 In Linux, I have used this way  
  sed '\ | & Lt; Table name = "MANAGED_USER" keys = "CONTEXT_ID, USERNAME" & gt; | A \ my text here 'file.xml & gt; & Gt; File1.xml   
 
 
 I was looking for something similar in my shell script.  
 This article fixes my problem:  
 What I used to do:  
  awk "/ pattern / {print" Your text here "} 1 '$ FILE & gt; / Tmp / patawk cp / tmp / patawk $ FILE rm / tmp / patawk