The following constants are recognized by name:

e |
Natural log base |

pi |
3.14159... |

PI |
3.14159... |

NULL |
0 |

INFINITY |
Maximum extent of object coordinate field |

TRUE |
1 |

FALSE |
0 |

EOF |
-1 |

CHARGE |
1.60217646e-19 |

CTOK |
273.15 |

BOLTZ |
1.3806226e-23 |

ROOT2 |
square root of 2 |

The value of `INFINITY` is the internally assumed absolute limit
for valid coordinates, in microns. This is 1e9 divided by the
database resolution, which is the value of the *DatabaseResolution* variable if set, or the default of 1000.

Stephen R. Whiteley 2018-04-19