StringListAttributeDefinition should map to <xs:list itemType="xs:string"/>

The parser for StringListAttributeDefinition should directly map to <xs:list itemType="xs:string"/>. The current parser (as of ad989b273330d5e02f0687fe8e3065d0a0eef8f2) splits on " " which doesn't cover the range of delimiters allowed in an xml list attribute. Using the regex "[ \\t\\n
r]+" (see http://www.w3.org/TR/2000/WD-xml-2e-20000814#NT-S) would allow the full range of values.