Change artifact database v param to be type TEXT This is neccessary for large theme lists for example in the map. The 256 chars limit could easily be overtaken. I am using this for quite some time now and the upcoming version appears to be a good place to test this.

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