9. The method of claim 5 , wherein the selecting of the subset of identified sequences based on assigned scores of nodes of the subset of identified sequences includes summing the scores of nodes in the sequences, no more than one score per page being summed.
5. The method of claim 1 , wherein the computing subset of the identified sequences comprises: for each of the identified sequences, defining the identified sequence as a series of nodes, each node representing a state of the sequence for a page of a plurality of consecutive pages, each node comprising a term or a hole, wherein a hole identifies the page as lacking a term of the sequence; selecting a subset of identified sequences based on assigned scores of nodes of the subset of identified sequences which cover at best the entire document, the assigned score of each node of the selected sequences being a function of at least one of: whether the node comprises a hole or a term, a number of terms in the sequence, and a coverage of the sequence.