simpleType  length-with-optional-unit 
versionV3_1
namespacehttp://www.w3.org/1998/Math/MathML
typerestriction of xsd:string
used by
attribute {}:mfrac.attlist/@linethickness  {}:mstyle.attlist/@linethickness
source<xsd:simpleType  name="length-with-optional-unit">
<xsd:restriction  base="xs:string">
<xsd:pattern  value="-?([0-9]+|[0-9]*\.[0-9]+)*(em|ex|px|in|cm|mm|pt|pc|%)?">
</xsd:pattern>
</xsd:restriction>
</xsd:simpleType>