void QgsCategorizedSymbolRendererV2::toSld( QDomDocument &doc, QDomElement &element ) const
{
  QgsStringMap props;
  props[ "attribute" ] = mAttrName;
  if ( mRotation.data() )
    props[ "angle" ] = mRotation->expression();
  if ( mSizeScale.data() )
    props[ "scale" ] = mSizeScale->expression();

  // create a Rule for each range
  for ( QgsCategoryList::const_iterator it = mCategories.constBegin(); it != mCategories.constEnd(); ++it )
  {
    QgsStringMap catProps( props );
    it->toSld( doc, element, catProps );
  }
}
void QgsCategorizedSymbolRendererV2::toSld( QDomDocument &doc, QDomElement &element ) const
{
  QgsStringMap props;
  props[ "attribute" ] = mAttrName;
  if ( !mRotationField.isEmpty() )
    props[ "angle" ] = QString( mRotationField ).append( "\"" ).prepend( "\"" );
  if ( !mSizeScaleField.isEmpty() )
    props[ "scale" ] = QString( mSizeScaleField ).append( "\"" ).prepend( "\"" );

  // create a Rule for each range
  for ( QgsCategoryList::const_iterator it = mCategories.constBegin(); it != mCategories.constEnd(); it++ )
  {
    QgsStringMap catProps( props );
    it->toSld( doc, element, catProps );
  }
}