ZIL是一个基于Google Zanzibar论文的Lean4关系型语言和领域特定语言（DSL），用于在项目中描述对象、它们之间的关系以及衍生规则1。该工具为开发者、审查工具、CI流程、文档工具和AI助手提供统一的项目关系图查询接口1。
ZIL采用Google Zanzibar论文中的授权元组模型（object#relation@user）来表示关系1。通过使用Horn规则进行关系推导并支持传递性推导1，该工具能够支持包括需求追踪、依赖分析和变更影响评估在内的多种功能1。具体的关系查询能力包括确定哪个声明实现了特定需求、哪个定理验证了某个组件、哪些模块依赖于某个声明，以及哪个任务在等待某个结果1。
ZIL包含原生可执行文件，支持编译、查询、追踪和影响分析等多种操作1。该项目将Lean版本钉在leanprover/lean4:v4.31.01，并支持导出到Soufflé Datalog或Prolog格式1。
ZIL, a new relational language and domain-specific language built on Lean4, has been introduced to help developers model and query relationships within software projects 1. Drawing from Google Zanzibar's authorization tuple model, the system uses the object#relation@user format to represent project entities and their interconnections 1.
The tool enables developers, code review systems, continuous integration pipelines, documentation generators, and AI assistants to access a unified query interface for project relationship graphs 1. This capability supports multiple analytical tasks, including requirement traceability, dependency analysis, change impact assessment, and tracking which tasks await specific results and which theorems verify specific components 1. The implementation leverages Horn rules for relationship derivation with support for transitive inference 1.
The project is built with Lean version pinned to leanprover/lean4:v4.31.0 and includes a native zil executable that supports compilation, querying, tracing, and impact analysis operations 1. Additionally, the system can export relationship data to Soufflé Datalog or Prolog formats for broader compatibility 1.
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