Does Order Matter? An Empirical Study on Generating Multiple Keyphrases as a Sequence
This work addresses a methodological gap in keyphrase generation for NLP researchers, but it is incremental as it focuses on optimizing an existing paradigm.
The study investigated the impact of different ordering strategies when concatenating multiple keyphrases as a sequence for keyphrase generation, identifying a preferable ordering and summarizing empirical findings and challenges.
Recently, concatenating multiple keyphrases as a target sequence has been proposed as a new learning paradigm for keyphrase generation. Existing studies concatenate target keyphrases in different orders but no study has examined the effects of ordering on models' behavior. In this paper, we propose several orderings for concatenation and inspect the important factors for training a successful keyphrase generation model. By running comprehensive comparisons, we observe one preferable ordering and summarize a number of empirical findings and challenges, which can shed light on future research on this line of work.