Our DPP-based framework belongs to a strand of optimization-based methods.
iC-SiSumm (Gillick et al., 2009) formulates extractive summarization as integer linear programming; it identifies a globally-optimal set of sentences covering the most important concepts of the source documents; DPP (Kulesza and Taskar, 2011) selects an optimal set of sentences that are representative of the source documents and with maximum diversity, as determined by the determinantal point process.