XML Format

You can use a java plugin for this. You can take help of jaxb to parse the xml in to the java object and then create a appian cdt from same java object.

How about using toxml() function and then manipulating its output by text functions. You can strip out the <n1:EmployeeDetails> from the output. You could try it with different text functions(cleanwith() and stripwith() come to mind) or use regex functions. There is one regex plugin in Shared components which allows replacing a pattern in a text.

i agree with chetany his solution is much easy i guess.

@chetany...I have tried stripwith() ,but it is removing all the characters wherever it is present.But i want to remove only in the XML header and footer .

@sparshs...could you please elaborate more on using java plugin

@Sridevi Try creating an expression rule which accepts an input of type Text which holds value and another input which holds property, and return the response as XML Format, where the rule input which holds property, use it to form a Tag, and the input which holds the value, treat it as the value of this tag, and return , and in target place append the response into a local variable,

hope this can give you an alternate idea to achieve this

Is that okay if you get the below format?
<EmployeeDetails>
<firstName>xyz</firstName>
<lastName>abc</lastName>
</EmployeeDetails>

xpathsnippet(jsontoxml(a!tojson(ri!test),"Root","T"), "//Root") tried this but cannot able remove the root node that is appended in jsontoxml

@Sridevik: What information you want basically regarding plugin , is it the flow or the architecture of plugin?

@chandrasekharg...yes that format is what i exactly want..Even i used the xpathsnippet() but it is returning root node also.I want to exclude root node too.