Legal Knowledge Graph (LegalKG)

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A Legal Knowledge Graph (LegalKG) is a legal KB that is a domain-specific knowledge graph for legal concepts (legal entities and legal relations).



References

2023

This Contract Knowledge Graph serves as a visual and structured representation of the contractual relationships, obligations, and key information within a legal document. It aids in contract analysis, due diligence, and understanding the legal implications of the agreement. Advanced legal knowledge graphs may incorporate more complex entities, legal precedents, and regulatory references to enhance their utility in legal research and compliance tasks.

2021

  • (Github, 2021) ⇒ https://github.com/AnjaneyaTripathi/knowledge_graph
    • QUOTE: A knowledge graph has been constructed as a proof of concept on legal documents using the litigation releases from the SECs Website.

      The documents have been categorised into 4 main categories - Fraud, Insider Trading, Misappropriation of Funds and Unregistered Brokers. (There are more categories, but this is just a PoC so we have considered only these 4).

      After the classification, we have proceeded to extract relevant information from these litigations such as the violations, violators, action taken against the individuals as well as the fine imposed. These have been stored in a tabular format. The above data has also been prepared to be converted into a knowledge graph which is nested in nature.

2020

  • (Sovrano et al., 2020) ⇒ Francesco Sovrano, Monica Palmirani, and Fabio Vitali. (2020). “Legal Knowledge Extraction for Knowledge Graph based Question-answering.” (PDF). In: Legal Knowledge and Information Systems, pp. 143-153 . IOS Press,
    • QUOTE: This paper presents a hybrid and innovative approach to model legal knowledge extracted from heterogeneous legal sources, using ontology design patterns as skeleton for mapping the information deducted using OKE and linguistic NLP analysis. In a legal domain, with multiple conflicting norms and a large number of multiple definitions for the same concept, our proposed approach gives interesting results, providing a KG where the legal expert can easily retrieve the relevant information via critical queries. The KG provides a useful instrument for information navigation, that could be integrated in traditional information systems and legal databases.(...)In the future we intend to integrate our approach in existing tools[1] for legal document analysis, as the first part of a sophisticated explanatory tool for making sense of complex legal documents, facilitating the process of representing legal knowledge in machine-compatible ways (e.g. ontologies, taxonomies, thesauri, etc..).