Automated semantic grammar generation in dialogue-based task-oriented systems

dc.contributor.authorTriantafyllou, Georgios
dc.contributor.departmentChalmers tekniska högskola / Institutionen för mekanik och maritima vetenskapersv
dc.contributor.examinerWahde, Mattias
dc.contributor.supervisorWahde, Mattias
dc.description.abstractDialogue-base task-oriented systems are conversational systems that can complete tasks and answer questions. A semantic grammar can be helpful for user input recognition in such systems. Manually creating semantic grammars can be cumbersome for a developer and delay the deployment of the system, thus it would be of great assistance to automate the process. The topic of automated semantic grammar generation has not been deeply explored and current approaches in this field are either semi-automated or lack interpretability and robustness. In this thesis, the prospect of developing a completely automated semantic grammar generation method was investigated. An additional aim was to create a method that could be employed in different domains without needing any additional modifications. We propose a novel method that utilizes syntactic and relation analysis to infer the semantics of a user input. The method developed is a hybrid approach that comprises statistical methods for the syntactic analysis and a rule-based model for the semantics. The results show that the method is able to generate a fairly accurate and precise semantic grammar. It is also observed that the method is not able to fully analyze all possible pattern cases. Furthermore, the relation analysis has proved to be helpful on finding semantic synonymity amongst different user input patterns. It is plausible to completely automate the creation of a semantic grammar and our findings suggest that hybrid approaches can preform well in this task. Nevertheless, further adjustments should be made in the rule-based model to provide a universal coverage of pattern casessv
dc.subjectSemantic grammarsv
dc.subjectconversational systemssv
dc.subjectsyntactic analysissv
dc.subjectsemantic analysissv
dc.subjectinformation extractionsv
dc.titleAutomated semantic grammar generation in dialogue-based task-oriented systemssv
dc.type.degreeExamensarbete för masterexamensv
Ladda ner
Original bundle
Visar 1 - 1 av 1
Bild (thumbnail)
2021-56 Georgios Trianfafyllou.pdf
655.21 KB
Adobe Portable Document Format
Master Thesis
License bundle
Visar 1 - 1 av 1
Bild saknas
1.51 KB
Item-specific license agreed upon to submission