In this paper, we present a summary of XCSP³, together with its ecosystem. XCSP³ is a format used to build integrated representations of combinatorial constrained problems. Interestingly, XCSP³ preserves the structure of models, by handling arrays of variables and groups/blocks of constraints, which makes it rather unique in the literature. Furthermore, the ecosystem of XCSP³ is well supplied: it includes companion tools (parsers and checkers), a website with a search engine for selecting and downloading instances, and competitions of solvers. The Java-based modeling API, called JvCSP³, is the last developed piece of this complete production chain.

中文翻译：

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XCSP 3及其生态系统

在本文中，我们对XCSP ³及其生态系统进行了总结。XCSP ³是用于构建组合约束问题的集成表示的格式。有趣的是，XCSP ³通过处理变量数组和约束组/约束块来保留模型的结构，这使其在文献中相当独特。此外，XCSP ³的生态系统提供了丰富的资源：它包括配套工具（解析器和检查器），带有用于选择和下载实例的搜索引擎的网站以及求解器的竞赛。基于Java的建模API（称为JvCSP ³）是该完整生产链的最后开发部分。