attributeGroup  msup.attlist 

version	V3_0
namespace	http://www.w3.org/1998/Math/MathML
used by	complexType   {http://www.w3.org/1998/Math/MathML}:msup.type
attributes	Name   Type   Use   Default   Fixed   annotation superscriptshift   length-with-unit                 class   xsd:NMTOKENS                 style   xsd:string                 xref   xsd:IDREF                 id   xsd:ID                 xlink:href   xsd:anyURI
source	<xsd:attributeGroup  name="msup.attlist"> <xsd:attribute  name="superscriptshift"  type="length-with-unit"> </xsd:attribute> <xsd:attributeGroup  ref="Common.attrib"> </xsd:attributeGroup> </xsd:attributeGroup>

attribute  msup.attlist/@superscriptshift 

type	length-with-unit
source	<xsd:attribute  name="superscriptshift"  type="length-with-unit"/>