layer.txt

LAYER
    CLASSITEM "MyField"
    CONNECTION "./myname.shp"
    CONNECTIONTYPE OGR
    METADATA
      "coordsys_name"	"WGS 84 / UTM zone 33N"
    END # METADATA
    NAME "NameLayer"
    PROJECTION
      "proj=utm"
      "zone=33"
      "datum=WGS84"
      "units=m"
      "no_defs"
    END # PROJECTION
    STATUS ON
    TEMPLATE "query"
    TILEITEM "location"
    TYPE POINT
    UNITS METERS
    CLASS
      NAME "Class 1"
      EXPRESSION "myex1"
      STYLE
        COLOR 254 0 0
        OUTLINECOLOR 0 0 0
        SIZE 8
        SYMBOL "default-marker"
      END # STYLE
      TITLE ""
    END # CLASS
    CLASS
      NAME "Class 2"
      EXPRESSION "myex2"
      STYLE
        COLOR 254 0 0
        OUTLINECOLOR 0 0 0
        SIZE 12
        SYMBOL "Square"
      END # STYLE
      TITLE ""
    END # CLASS
    CLASS
      NAME "Class 3"
      EXPRESSION "myex3"
      STYLE
        COLOR 254 0 0
        OUTLINECOLOR 0 0 0
        SIZE 12
        SYMBOL "Triangle"
      END # STYLE
      TITLE ""
    END # CLASS
  END # LAYER