Range:             ampid > 0

Range:             commid > 0

Range:		Any valid float. datetime = 0.0 on January 01, 1970 at 00:00:00.0000

Units:		Seconds

Range:             Any free-format string up to 6 characters

Range:             Any free-format string up to 8 characters. If available, use the two character FDSN code for the network

Range:            Any free-format string up to 15 characters

Range:             Any free-format string up to 8 characters

Range:             	Any valid channel name, which may be network-specific. Networks using SEED channel names should use the same value for channel and seedchan

Range:             Any free-format string up to 8 characters long

Range:		seedchan = {E | S | H | B | M | L | V | U | R} U
		                   {A | B | D | F | G | H | I | K | L | M | P | R | S | V | T | W} U
		                   {Z | N | E | A | B | C | T | R | 1 | 2 | 3 | U | V | W}
		Band code:
						Sample rate (Hz)	Corner period (sec)
		E = extremely short period		³ 80			< 10
		S = short period			³ 10 to < 80		< 10
		H = high broad band		³ 80			³ 10
		B = broad band			³ 10 to < 80		³ 10
		M = mid period			> 1 to < 10
		L = long period			~ 1
		V = very long period			~ 0.1
		U = ultra long period			~ 0.01
		R = extremely long period		~ 0.001

		Instrument code:
		A = tiltmeter			B = creepmeter
		D = pressure			F = magnetometer
		G = gravimeter/accelerometer		H = high gain seismometer			
		I = humidity			K = temperature
		L = low gain seismometer		M = mass position seismometer
		P = geophone			R = rainfall
		S = linear strainmeter		V = volumetric strain
		T = tide meter			W = wind

		Component code:
		N = north-south		E = east-west
		T = transverse		R = radial
		Z = vertical
		A, B, C = triaxial
		1, 2, 3 = orthogonal components but non-traditional orientations
		U, V, W = optional components

Range:             Any free-format string up to 2 characters long

Range:            Any free-format string up to 8 characters

Range:             amplitude > 0.0

Range:		amptype = {WA | WAS | WASF | PGA | PGV | PGD | WAC | WAU | IV2 | SP.3 | SP1.0 | SP3.0 | ML100 | ME100 | EGY | M0}
		WA = Wood-Anderson photographic
		WAS = Wood-Anderson synthetic
		WASF = Wood-Anderson synthetic that has had extra filtering
		PGA = peak ground acceleration
		PGV = peak ground velocity
		PGD = peak ground displacement
		WAC = Wood-Anderson corrected
		WAU = Wood-Anderson uncorrected
		IV2 = integral of velocity squared
		SP.3 = spectral peak
		SP1.0 = spectral peak
		SP3.0 = spectral peak
		ML100 = local magnitude
		ME100 = energy magnitude
		EGY = energy
		M0 = M0 for moment

Range:		units = {c | s | mm | cm | m | ms | mss | cms | cmss | mms | mmss | mc | nm | e | cmcms | dycm | none}
		c = counts
		s = seconds
		mm = millimeters
		cm = centimeters
		m = meters
		ms = meters per second
		mss = meters per second per second
		cms = centimeters per second
		cmss = centimeters per second per second
		mms = millimeters per second
		mmss = millimeters per second per second
		mc = microns
		nm = nanometers
		e = ergs
		cmcms = cm^2 * sec
		dycm = dyne centimeters
		none = no units

Range:		ampmeas = {0 | 1}
		0 = peak-to-peak
		1 = zero-to-peak

Range:             eramp >= 0.0

Range:            flagamp = {SUR | P | S | ALL}
                       SUR = surface wave
                       P = P packet
                       S = S packet
                       ALL = entire waveform

Range:		per > 0.0

Units:		Seconds

Range:             snr > 0.0

Range:		tau > 0.0

Units:		Seconds

Range:             0.0 <= quality <= 1.0

Range:		rflag = {A | H | F}
		A = automatic
		H = reviewed by human
		F = finalized

Range:             cflag in { BN | OS | CL}
                        BN = below noise
                        OS = on scale
                        CL = clipped

Range:		Any valid float. wstart = 0.0 on January 01, 1970 at 00:00:00.0000

Units:		Seconds

Range:		duration > 0.0

Units:		Seconds

Range:		Any valid date between January 01, 4712 BC and January 01, 4712 AD

Units:		 YYYY/MM/DD HH24:MI:SS