To start, I have almost zero experience with XML scripting/language but do have programming skills with other languages... this is something i have taken on at the behest of a colleague since it seems i am the only one with any programming knowledge... I was wondering if it is possible to take an xml list and using a sed,awk or perl script pass it a list of xml elements(plugin names) and insert a value(session name) keeping within the formatting rules... so the final command would look like

Code:
$xml_edit file.xml plugin_list.txt SESSION3
plugin_list.txt would contain the values:

CopyAtValidation
CopyAtFinish

Given a snippet of file.xml:

Code:
   <plugin name="CopyAtValidation"
        <plugin-filter code="some_filter.java">
               <param name="SessionName" value="
                SESSION1,
                SESSION2"/>
        </plugin-filter>
    </plugin>

	   <plugin name="CopyAtStart"
        <plugin-filter code="some_filter.java">
               <param name="SessionName" value="
                SESSION1,
                SESSION2"/>
        </plugin-filter>
    </plugin>
		
	   <plugin name="CopyAtFinish"
        <plugin-filter code="some_filter.java">
               <param name="SessionName" value="
                SESSION1,
                SESSION2"/>
        </plugin-filter>
    </plugin>
I would like to add the value of SESSION3 to plugins CopyAtValidation and CopyAtFinish only so the final result looks like:

Code:
   <plugin name="CopyAtValidation"
        <plugin-filter code="some_filter.java">
               <param name="SessionName" value="
                SESSION1,
                SESSION2,
		SESSION3"/>
        </plugin-filter>
    </plugin>

	   <plugin name="CopyAtStart"
        <plugin-filter code="some_filter.java">
               <param name="SessionName" value="
                SESSION1,
                SESSION2"/>
        </plugin-filter>
    </plugin>
		
	   <plugin name="CopyAtFinish"
        <plugin-filter code="some_filter.java">
               <param name="SessionName" value="
                SESSION1,
                SESSION2,
		SESSION3"/>
        </plugin-filter>
    </plugin>

I do want to point out that when you do insert the new values you have to add a comma to the end of the line of the previous value... namely SESSION2 otherwise this wont work.