These are unofficial data splits for the corpus MADCAT Arabic (LDC2013T15, LDC2013T09, LDC2012T15). 
LDC is providing only training data for these corpora and not the original dev/eval sets, so the original
training data have been split into three different disjoint parts (i.e. there shouldn't be sentences/lines 
from the same document in different sets -- as each document is handwritten/transcribed 
by a different author in the MADCAT data) to allow for evaluation of the performance in the usual way.
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Also, please not that the license relates only for the splits. You still need to obtain the original databases
and respect the databases' license!
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It contains the madcat xml name and segment id (s{1,2,3,4}). For example:
<pre>
	groups.google.com_women1000_508c404bd84f8ba3_ARB_20060426_124900_3_LDC0188.madcat.xml s1
	groups.google.com_women1000_508c404bd84f8ba3_ARB_20060426_124900_3_LDC0188.madcat.xml s2
	groups.google.com_women1000_508c404bd84f8ba3_ARB_20060426_124900_3_LDC0188.madcat.xml s3
</pre>