X_Y		position on the array

X		x position

Y		y position

oligo		probe sequence (3' -> 5')

qualifier	Affymetrix probe name

orf_name	deletion strain ORF

batches		deletion strain batch

up_dntag	deletion strain tag

sense		whether probe is tag sense or antisense (previous arrays had both)

tag_type	tag3		tag probe
		tag3-bad	tag probe with an improved repaired version
		repaired	repaired tag probe that should be used instead of the original version
		repaired-bad	repaired tag probe that should not be used
		affy		Affymetrix control probes
		orf		Probes for genomic DNA or RNA

copy		for tag probes only, copy1 - copy5