Abstract Those attempting to integrate building information modeling (BIM) and blockchain soon encounter the enormous challenge of information redundancy. Storage of duplicated building information in decentralized ledgers already creates redundancy, and this is exacerbated as the BIM model develops and is utilized. This paper presents a novel semantic differential transaction (SDT) approach to minimizing information redundancy in the nascent field of BIM and blockchain integration. Whereas the conventional thinking is to store an entire BIM model or its signature code in blockchain, SDT captures local model changes as SDT records and assembles them into a BIM change contract (BCC). In this way, the version history of a BIM project becomes a chain of timestamped BCCs, and stakeholders can promptly synchronize BIM changes in blockchain. We test our approach in two pilot cases. The results show that SDT captures, in near real time, sequential and simultaneous BIM changes at

中文翻译：

---

一种最小化BIM和区块链集成信息冗余的语义差分交易方法

摘要 那些试图整合建筑信息模型（BIM）和区块链的人很快就会遇到信息冗余的巨大挑战。在分散的分类账中存储重复的建筑信息已经造成了冗余，随着 BIM 模型的开发和使用，这种情况更加严重。本文提出了一种新颖的语义差分事务 (SDT) 方法，以最大限度地减少 BIM 和区块链集成的新兴领域中的信息冗余。传统的想法是将整个 BIM 模型或其签名代码存储在区块链中，而 SDT 捕获本地模型更改作为 SDT 记录并将它们组装成 BIM 更改合同（BCC）。这样，一个 BIM 项目的版本历史就变成了一个带有时间戳的 BCC 链，利益相关者可以及时同步区块链中的 BIM 变化。我们在两个试点案例中测试我们的方法。结果表明，SDT 近乎实时地捕捉到了