<?xml version="1.0" encoding="ISO-8859-1"?>
<XMLResults>
<Result>
<user_id>1</user_id>
<official_code>bgate</official_code>
<lastname>Gate</lastname>
<firstname>Bill</firstname>
<score>2</score>
<date>2009-2-25 12:28</date>
</Result>
<Result>
<user_id>2</user_id>
<official_code>ltorvald</official_code>
<lastname>Torvald</lastname>
<firstname>Linus</firstname>
<score>10</score>
<date>2009-2-25 12:28</date>
</Result>
<Result>
<user_id>3</user_id>
<official_code></official_code>
<lastname>Smith</lastname>
<firstname>John</firstname>
<score>3</score>
<date></date>
</Result>
</XMLResults>
<?xml version="1.0" encoding="ISO-8859-1"?>
<XMLResults>
<Result>
<user_id>1</user_id>
<score>2</score>
</Result>
<Result>
<user_id>2</user_id>
<score>10</score>
</Result>
<Result>
<user_id>27</user_id>
<score>3</score>
</Result>
</XMLResults>
<?xml version="1.0" encoding="ISO-8859-1"?>
<XMLResults>
<Result>
<user_id>1</user_id>
<official_code>bgate</official_code>
<lastname>Gate</lastname>
<firstname>Bill</firstname>
<score>0</score>
<date>2009-2-25 12:28</date>
</Result>
<Result>
<user_id>2</user_id>
<official_code>ltorvald</official_code>
<lastname>Torvald</lastname>
<firstname>Linus</firstname>
<score>1</score>
<date>2009-2-25 12:28</date>
</Result>
<Result>
<user_id>3</user_id>
<official_code></official_code>
<lastname>Smith</lastname>
<firstname>John</firstname>
<score>0</score>
<date></date>
</Result>
</XMLResults>
You could also use a minimal XML file for the presence.