compare xml file

Question

hi, 

i want to ask how to compare 2 xml node in different xml file. 

for example like this, 

first xml file i have like this,

<create>

<capabilities>

<capability name="brand_name" value="Toyota" />

<capability name="model_name" value="Avanza" />

<capability name="series" value="AB32" />

<capability name="p_method" value="manual" />

<capability name="p_method" value="automatic" />

</capabilities> 

</create>                                                                                                                        

and for the second xml file, i have like this,

<Query>

<ItemTypeName>AndroidGame Toyota Avanza</ItemTypeName>

<UserAgent>blalal32123123</UserAgent>

</Query>

<Query>

<ItemTypeName>AndroidGame Toyota Avanza 2.0</ItemTypeName>

<UserAgent> olaolalalallalalalaa </UserAgent>

</Query>

and i want know how to compare between node, i mean for second xml file in first node itemtypename androidgame toyota avanza if have the same value with the first xml file 

<capability name="brand_name" value="Toyota" />

<capability name="model_name" value="Avanza" />

and the final result like this

<create>

<capabilities>

<capability name="brand_name" value="Toyota" />

<capability name="model_name" value="Avanza" />

<capability name="series" value="AB32" />

<capability name="p_method" value="manual" />

<capability name="p_method" value="automatic" />

<capability name="useragent" value=" blalal32123123 " /> // this is from second xml file

</capabilities> 

</create>  

anyone can help me for this? i really need. thanks