Annotations with EARMARK for arbitrary, overlapping and out-of order markup.

Silvio Peroni Fabio Vitali Annotations with EARMARK for arbitrary, overlapping and out-of order markup. 171-180 2009 ACM Symposium on Document Engineering http://doi.acm.org/10.1145/1600193.1600232 conf/doceng/2009 db/conf/doceng/doceng2009.html#PeroniV09