xsi:type on sparql:literal elements

Felix is following well in the tradition of sharp eyes from the i18n
domain. He pointed out that
  <http://www.w3.org/2001/sw/DataAccess/rf1/output.xml>
has an xsi:type="xs:integer" on a complex type:
  <http://www.w3.org/2001/sw/DataAccess/rf1/result2.xsd>
(look for literal)
  <http://www.w3.org/TR/xmlschema-0/#UseDerivInInstDocs>
implies that xsi:type on a complex type applies to the element,
not the content.

Could have a throw-away simple type or wait for a schema lang with
more ways to spell "type".
-- 
-eric

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