The article offers a comprehensive guide to Directed Acyclic Graphs (DAG) and their applications, focusing on Constellation (DAG), a zero-layer blockchain infrastructure aimed at scalable enterprise integration. It discusses the project's unique hypergraph technology, two-tier consensus model, and composable microservices. Targeting developers and enterprises venturing into the blockchain realm, it covers Constellation's market position, ecosystem applications, and strategic partnerships. The structure logically follows Constellation's origins, technical architecture, market data, and community resources, highlighting its value as a potential Web3 infrastructure component.