simpleType  mpadded-space  
version  
namespace http://www.w3.org/1998/Math/MathML
type restriction of xsd:string 
used by
attribute     {}:mpadded.attlist/@depth {}:mpadded.attlist/@height {}:mpadded.attlist/@lspace 
source <xsd:simpleType  name="mpadded-space">
<xsd:restriction  base="xs:string">
<xsd:pattern  value="(\+|-)?([0-9]+|[0-9]*\.[0-9]+)(((%?) *(width|lspace|height|depth))|(em|ex|px|in|cm|mm|pt|pc))">
</xsd:pattern>
</xsd:restriction>
</xsd:simpleType>