典型的SDE30定义如下：
SDE30\u DEF WORLD\SDE\u LAYER WORLD\u GEOM\SDE\u GRID{0}1000000\SDE\u DIMENSION 2\SDE\u CONFIG\u KEYWORD DEFAULTS\SDE\u MEASURED Y\SDE\u ANNOTATED Y\SDE\u AREA Y\SDE\u LINE Y\SDE\u POINT Y\SDE\u SIMPLE\u LINE Y\SDE\u NIL Y\SDE\u MULTIPART Y\SDE\u XORIGIN-19000000\SDE\u YORIGIN-19000000\SDE\u SCALE 10\SDE\u ZORIGIN 0\SDE\u ZSCALE 1\SDE\u MEASURED\u ORIGIN0\SDE\u MEASURED\u SCALE 1\SDE\u TOLERANCE 0.0004\SDE\u MEASURED\u TOLERANCE\SDE\u ZTOLERANCE\SDE\u INDEX countryCapital\SDE\u INDEX\u CONFIG DEFAULTS\SDE\u COLUMN\u NAME COUNTRY，CAPITAL\SDE\u UNIQUE N\SDE\u SORT\u ORDER ASCEND\COUNTRY char（3）\CAPITAL char（30）\SDE\u UPDATE\u FIELDS COUNTRY，CAPITAL