Towards Legal Change Analysis: Clustering of Polish Civil Code Amendments

Due to the growing activity of legislators, lawyers are in need of tools that would allow them to get a better understanding of an ever-growing corpus of legislative materials. Herein we propose a tool that visualizes and clusters thematically similar amending acts, allowing a lawyer to quickly review related provisions, thus giving an insight into a legislative history of a given legal institution. The methods suggested herein (based on TF-IDF, word and paragraph embeddings and PCA as well as k-mean clustering) are evaluated on the provisions of the Polish Civil Code.