Introducing the A2AJ's Canadian Legal Data: An open-source alternative to CanLII for the era of computational law

Fuente: arXiv
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Main Authors: Wallace, Simon, Rehaag, Sean
Format: Preprint
Published: 2025
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author Wallace, Simon
Rehaag, Sean
author_facet Wallace, Simon
Rehaag, Sean
contents The Access to Algorithmic Justice project (A2AJ) is an open-source alternative to the Canadian Legal Information Institute (CanLII). At a moment when technology promises to enable new ways of working with law, CanLII is becoming an impediment to the free access of law and access to justice movements because it restricts bulk and programmatic access to Canadian legal data. This means that Canada is staring down a digital divide: well-resourced actors have the best new technological tools and, because CanLII has disclaimed leadership, the public only gets second-rate tools. This article puts CanLII in its larger historical context and shows how long and deep efforts to democratize access to Canadian legal data are, and how often they are thwarted by private industry. We introduce the A2AJ's Canadian Legal Data project, which provides open access to over 116,000 court decisions and 5,000 statutes through multiple channels including APIs, machine learning datasets, and AI integration protocols. Through concrete examples, we demonstrate how open legal data enables courts to conduct evidence-based assessments and allows developers to create tools for practitioners serving low-income communities.
format Preprint
id arxiv_https___arxiv_org_abs_2509_13032
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Introducing the A2AJ's Canadian Legal Data: An open-source alternative to CanLII for the era of computational law
Wallace, Simon
Rehaag, Sean
Computers and Society
Artificial Intelligence
The Access to Algorithmic Justice project (A2AJ) is an open-source alternative to the Canadian Legal Information Institute (CanLII). At a moment when technology promises to enable new ways of working with law, CanLII is becoming an impediment to the free access of law and access to justice movements because it restricts bulk and programmatic access to Canadian legal data. This means that Canada is staring down a digital divide: well-resourced actors have the best new technological tools and, because CanLII has disclaimed leadership, the public only gets second-rate tools. This article puts CanLII in its larger historical context and shows how long and deep efforts to democratize access to Canadian legal data are, and how often they are thwarted by private industry. We introduce the A2AJ's Canadian Legal Data project, which provides open access to over 116,000 court decisions and 5,000 statutes through multiple channels including APIs, machine learning datasets, and AI integration protocols. Through concrete examples, we demonstrate how open legal data enables courts to conduct evidence-based assessments and allows developers to create tools for practitioners serving low-income communities.
title Introducing the A2AJ's Canadian Legal Data: An open-source alternative to CanLII for the era of computational law
topic Computers and Society
Artificial Intelligence
url https://arxiv.org/abs/2509.13032