// Formats for Batch Update commands.
// (Note that all models accept this format, and ignore inapplicable data).

// The field separator is the pipe character '|'
// There is no sensitivity to case.
// All commands are fail-safe, and may be repeated without restriction.

//  CT = Country two letter ident, optionally followed by '-' and the
//	 country name.
//       If the country is new to the database, the latter form is mandatory.
//  Lat  = N or S, degrees, the tilde character, and minutes to 3 dec places.
//  Long = E or W, degrees, the tilde character, and minutes to 3 dec places.

// ADD|APT|ICAO|CT|City|Facility|Lat|Long|Height|Fuel|[MIL]
// where Height is in feet
//       Fuel (optional field) - any combination of the letters J, A, M
//       [MIL] (optional field) - either [MIL] or [PRV] 

// ADD|INT|ICAO|CT|Lat|Long

// ADD|NDB|ICAO|CT|City|Facility|Lat|Long|Frequency|L
// where L (optional field) - indicates the alternative icon.

// ADD|VOR|ICAO|CT|City|Facility|Lat|Long|Frequency|DME|WX|PWR
// where DME (optional field) may read DME, VORDME, TACAN, VORTAC, or VOR.
//       WX (optional field) must read WX.
//       PWR (optional field) may read LOW, HIGH, or TERM.

// ADD|RWY|ICAO|CT|LengthXWidth|Description|Surface|Lighting|Picture
// where Airport "ICAO|CT" must exist in the database
//       Length is in feet, and XWidth is optional. (eg 6000x150).
//       Description consists of the rwy heading range 00-18,
//                   optionally suffixed by L, R, or C.
//       Surface is one of:  Hard, Turf, Sealed, Gravel, Dirt, Soft,
//                           Unkwn, Water.
//       Lighting is one of: no lts, pc lts, pt lts, ft lts.
//       Picture is either zero, 
//                      or 2 hex digits (III Pilot icon stripe),
//                      or 8 hex digits (90/95 picture),
//                      or 2<space>4<space>8 digits (3P stripe/picture) 

// ADD|FRQ|ICAO|CT|Type|Frequency|M|R:restrictions
// where Airport "ICAO|CT" must exist in the database
//       Type is one of: ATIS, Ground, Tower, Unicom, Taxi,
//                       Clrnce, Multi, Other, Dep, App, Arrivl,
//                       Cls B, TMA, CTA, Cls C, TRSA.
//       M (optional field) must read "M" if present,
//       and is the "pc lts" frequency flag.
//       R:restrictions (optional field must start with R:)
//                       can consist of any of the
//                       following elements IN THIS ORDER,
//                       separated by spaces (d=digits 0-9):
//                       ddd-ddd  - bearings (must include leading zeros)
//                       ABOVEdddd- height 
//                       BELOWdddd- height
//                       REMOTEVORXXX - XXX is vor ident
//                       plain text

// ADD|USR|Ident|Lat|Long|Name 

// DEL|APT|ICAO|CT
// DEL|INT|ICAO|CT
// DEL|NDB|ICAO|CT
// DEL|VOR|ICAO|CT
// The above may optionally include City and Facility fields.
// If included, they must be correct.

// DEL|RWY|ICAO|CT|Length|Description
// DEL|FRQ|ICAO|CT|Type|Frequency
// DEL|USR|Ident

// Note that: 1) ADD when the item is present, is treated as modify.
//            2) DEL when the item is absent is not an error.

// This means that the same batch file may be run many times on the
// same database without problems.
// This is important while correcting errors in the file.

// The best way to obtain example batch files is to create some using
// File/SaveAs in your _GEN program.
// (This does not apply to USR entries, which cannot at present be dumped
//  in Batch format, and RTE entries which have no batch facilities at all).