Question on XMLSchema

I have a question on XML schema datatypes
If we define a user defined data type
double[] scores;
How do we call it in XML file
E.g:
<scores>
<scores>45.2</scores>
<scores>57.3</scores>
</scores
         
           ------------or------------
<scores>
<double>45.2</double>
<double>57.3</double>
</scores>

I request you to send me the response as soon as possible.

Thanks,
Rajani Kanigiri.