OpenSPG 团队您好：
感谢你们在 OpenSPG 和 KAG 项目上的工作。我目前正在学习如何使用 OpenSPG Schema、KGDSL 和 rule 规则定义来构建专业领域知识图谱。
我已经阅读了 README 和部分示例项目，例如 SupplyChain 示例，也注意到 KGDSL 被用于 schema 规则定义和 reasoner 查询中。但是，目前我没有找到一份较为完整、系统的 KGDSL 语法说明文档。
因此想请教一下：是否有官方的 KGDSL 文档、语法参考、示例集合或推荐阅读资料？
Hi OpenSPG team,
Thank you for your excellent work on OpenSPG and KAG. I am currently studying how to use OpenSPG Schema, KGDSL, and rule definitions to build a professional domain knowledge graph.
I have read the README and some example projects, such as the SupplyChain example, and I noticed that KGDSL is used in schema rule definitions and reasoner queries. However, I could not find a complete and systematic document explaining the detailed syntax of KGDSL.
Therefore, I would like to ask whether there is any official KGDSL documentation, grammar reference, example collection, or recommended material.
OpenSPG 团队您好：
感谢你们在 OpenSPG 和 KAG 项目上的工作。我目前正在学习如何使用 OpenSPG Schema、KGDSL 和 rule 规则定义来构建专业领域知识图谱。
我已经阅读了 README 和部分示例项目，例如 SupplyChain 示例，也注意到 KGDSL 被用于 schema 规则定义和 reasoner 查询中。但是，目前我没有找到一份较为完整、系统的 KGDSL 语法说明文档。
因此想请教一下：是否有官方的 KGDSL 文档、语法参考、示例集合或推荐阅读资料？
Hi OpenSPG team,
Thank you for your excellent work on OpenSPG and KAG. I am currently studying how to use OpenSPG Schema, KGDSL, and rule definitions to build a professional domain knowledge graph.
I have read the README and some example projects, such as the SupplyChain example, and I noticed that KGDSL is used in schema rule definitions and reasoner queries. However, I could not find a complete and systematic document explaining the detailed syntax of KGDSL.
Therefore, I would like to ask whether there is any official KGDSL documentation, grammar reference, example collection, or recommended material.