Is it possible to store arrays as a single entry with ofXml?

I started to use ofXml for presets. Right now every value is a single entry.
It looks like that:

<?xml version="1.0"?>
<data>
	<pattern4>
		<a1>129</a1>
		<a2>187</a2>
		<a3>17157</a3>
		<a4>17158</a4>
		<a5>17343</a5>
		<a6>17346</a6>
		<a7>17347</a7>
		<a8>17531</a8>
		<a9>17532</a9>
		<a0>10</a0>
	</pattern4>
	<pattern0>
		<a1>150</a1>
		<a2>100</a2>
		<a3>6549</a3>
		<a4>6550</a4>
		<a5>6648</a5>
		<a6>6651</a6>
		<a7>6652</a7>
		<a8>6749</a8>
		<a9>6750</a9>
		<a0>10</a0>
	</pattern0>
</data>

Now I wonder, is it is possible to store an array or an array as a string into a single entry?
One entry for one pattern, so to say…