Artifacts: ThemeDocument. The bloody part: Removal of the XPaths. Now the theme XML document is scanned once(!) at construction time for field values and the resulting key/value pairs are store in a map.

SYMBOLSET
SYMBOL
  NAME 'point'
  TYPE ELLIPSE
  POINTS
    1 1
  END
  FILLED TRUE
END
SYMBOL
  NAME "square"
  TYPE VECTOR
  POINTS
    0 0
    0 1
    1 1
    1 0
    0 0
  END
  FILLED TRUE
END
END