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measures.listcodes - Function

	Package	general
	Module	measures
	Tool	measures

get known reference codes

Synopsis
listcodes(ms)

Arguments

ms	in	the measure type for which to list
		Allowed:	a measure

Returns
record with two string vectors

Description
listcodes will produce the known reference codes for a specified measure type. It will return a record with two entries. The first is a string vector of all normal codes; the second a string vector (maybe empty) with all extra codes (like planets).

Example

# Generate some direction
# Note that an empty or non-specified reference code will produce the
# measure with the default code for that measure type
- a:=dm.direction()
- dm.getref(a)      
J2000 
- is_measure(a)
T 
# Get the known reference codes for direction
- dm.listcodes(a)
[normal=J2000 JMEAN JTRUE APP B1950 BMEAN BTRUE GALACTIC HADEC AZEL AZELSW
	AZELNE JNAT ECLIPTIC MECLIPTIC TECLIPTIC SUPERGAL ITRF TOPO, 
	extra=MERCURY VENUS MARS JUPITER SATURN URANUS NEPTUNE
		       PLUTO SUN MOON COMET]