XML

Here’s what the XML result looks like:
<?xml version="1.0" encoding="UTF-8"?>
<error_response xmlns="http://api.facebook.com/1.0/"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://api.facebook.com/1.0/ http://api.facebook.com/1.0/facebook.xsd">
<error_code>100</error_code>
<error_msg>Invalid parameter</error_msg>
<request_args list="true">
<arg>
<key>uids</key>
<value/>
</arg>
<arg>
<key>fields
<value/>
</arg>
<arg>
<key>callback</key>
<value/>
</arg>
<arg>
<key>app_id</key>
<value>2227470867</value>
</arg>
<arg>
<key>session_key</key>
<value>c50b22639edc8d2d0dd29357-7608007</value>
</arg>
<arg>
<key>v</key>
<value>1.0</value>
</arg>
<arg>
<key>method</key>
<value>facebook.users.getInfo</value>
</arg>
<arg>
<key>api_key</key>
<value>0289b21f46b2ee642d5c42145df5489f</value>
</arg>
<arg>
<key>call_id</key> <value>1186452883.4263</value> </arg> <arg> <key>sig</key>
<value>28186e1be6ee4015119a992b638b694a</value>
</arg>
</request_args>
</error_response>