search_accounts_by_custom_profile.xml

<account>
  <account_id>2285</account_id>
  <username>demo_user_0200</username>
  <first_name>Bob</first_name>
  <last_name>Jones</last_name>
  <email_address>bob@example.com</email_address>
  <phone_number>987-654-3210</phone_number>
  <city>Dallas</city>
  <state>TX</state>
  <num_unread_messages>1</num_unread_messages>
  <num_unread_notifications>0</num_unread_notifications>
  <num_pending_invites>0</num_pending_invites>
  <webcal_url>
    webcal://orgsync.com/calendar/user/feed/2285/c0869646ccf12998dc8ad7062fddf01dc189a1b0.ics
  </webcal_url>
  <memberships>
    <membership>
      <organization_id>226</organization_id>
      <admin>N</admin>
    </membership>
    <membership>
      <organization_id>694</organization_id>
      <admin>N</admin>
    </membership>
    ...
  </memberships>
  <current_grade/>
  <major/>
  <ethnicity/>
  <grad_date/>
  <student_id/>
  <major/>
  <birthday>1994-12-10 00:00:00 -0600</birthday>
  <live_on_campus/>
  <international_student/>
  <transfer_student/>
  <last_login>2011-02-01 17:40:12 -0600</last_login>
  <custom_profile>
    <hash>
      <element id="23569">
        <name>Gender</name>
        <data>Male</data>
      </element>
      <element id="23570">
        <name>Classification</name>
        <data>Senior</data>
      </element>
      <element id="23574">
        <name>Student ID</name>
        <data>123456</data>
      </element>
      ...
    </hash>
  </custom_profile>
</account>