SWRL sameAs/differentFrom inconsistency

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While recently writing translators between SWRL XML and SWRL RDF, I noticed
an inconsistency in the SWRL specification ([1] and previous versions).

The Abstract Syntax (and the RDF Concrete Syntax) use

  sameAs '(' i-object i-object ')'
  differentFrom '(' i-object i-object ')'

while the XML Concrete Syntax (and swrlx.xsd) uses

  <swrlx:sameIndividualAtom>
    Content: ( swrlx:iObject* )
  </swrlx:sameIndividualAtom>

  <swrlx:differentIndividualsAtom>
    Content: ( swrlx:iObject* )
  </swrlx:differentIndividualsAtom>

My preference would be to modify the XML Concrete Syntax to take exactly 2
iObject's for both atoms.

	Mike

[1] http://www.daml.org/rules/proposal/

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