scxml.extra.attribs 

group allowing attributes from other namespaces

Attribute Group Information

Attributes

Used By

Attribute Groups scxml.assign.attlist, scxml.cancel.attlist, scxml.content.attlist, scxml.data.attlist, scxml.datamodel.attlist, scxml.donedata.attlist, scxml.else.attlist, scxml.elseif.attlist, scxml.final.attlist, scxml.finalize.attlist, scxml.foreach.attlist, scxml.history.attlist, scxml.if.attlist, scxml.initial.attlist, scxml.invoke.attlist, scxml.log.attlist, scxml.onentry.attlist, scxml.onexit.attlist, scxml.parallel.attlist, scxml.param.attlist, scxml.raise.attlist, scxml.script.attlist, scxml.scxml.attlist, scxml.send.attlist, scxml.state.attlist, scxml.transition.attlist

Source 

<xsd:attributeGroup name="scxml.extra.attribs">
  <xsd:annotation>
    <xsd:documentation>group allowing attributes from other namespaces</xsd:documentation>
  </xsd:annotation>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:attributeGroup>