svg:langSpaceAttrs 

Common attributes for elements that might contain character data content

Attribute Group Information

Attributes

QName Type Fixed Default Use Inheritable Annotation
lang optional
space optional

Used By

Complex Types svg:aType, svg:altGlyphType, svg:circleType, svg:clipPathType, svg:defsType, svg:descType, svg:ellipseType, svg:feImageType, svg:filterType, svg:foreignObjectType, svg:gType, svg:imageType, svg:lineType, svg:markerType, svg:maskType, svg:pathType, svg:patternType, svg:polygonType, svg:polylineType, svg:rectType, svg:svgType, svg:switchType, svg:symbolType, svg:textPathType, svg:textType, svg:titleType, svg:trefType, svg:tspanType, svg:useType

Source 

<attributeGroup name="langSpaceAttrs">
  <annotation>
    <documentation>Common attributes for elements that might contain character data content</documentation>
  </annotation>
  <attribute ref="xml:lang" use="optional"/>
  <attribute ref="xml:space" use="optional"/>
</attributeGroup>