CDATA sections vs. entity references:
<![CDATA[<Oxygen/> has an Eclipse plugin for editing XML]]>
<Oxygen/> has an Eclipse plugin for editing XML
Entity references vs numeric character references
<Oxygen/> has an Eclipse plugin for editing XML
Decimal vs. hexadecimal character references
<Oxygen/> has an Eclipse plugin for editing XML
Attribute order
<property name="packages" value="nu.xom.*"/>
<property value="nu.xom.*" name="packages" />
White space inside tags