A Query Framework For Directed Acyclic Graphs Dags

A Query Framework for Directed Acyclic Graphs (DAGs)

Directed Acyclic Graphs in Theory and Practice

"Directed Acyclic Graphs in Theory and Practice" "Directed Acyclic Graphs in Theory and Practice" is a comprehensive and authoritative resource that bridges the foundational mathematics of directed acyclic graphs (DAGs) with their cutting-edge applications across computer science and engineering. The book begins by establishing the rigorous theoretical underpinnings of DAGs—delving into their formal definition, representational models, and fundamental properties, including relationships with lattices and posets. Complexity analysis and classic algorithms such as topological sorting set the stage for a nuanced understanding of how DAGs underpin some of the most essential concepts in computation. The narrative then flows into the practical and algorithmic heart of the subject: from memory- and computation-efficient algorithms to the orchestration of large, distributed, and parallel systems. Detailed treatments are given to the pivotal role of DAGs in compiler construction, data processing pipelines, database query planning, and workflow orchestration frameworks ubiquitous in today’s data-driven enterprises. The book highlights how DAGs enable robust solutions in challenging domains including machine learning model architecture, probabilistic reasoning, blockchain consensus protocols, and resource scheduling in distributed systems. Expanding further, the text explores advanced and emergent topics—from dynamic and incremental DAG algorithms for responsive systems to visual representation techniques and quantum computing applications. Throughout, the book maintains a careful balance between theory and implementation, underscoring open research directions and future trends. This volume is essential reading for graduate students, practitioners, and researchers seeking a deep and holistic understanding of Directed Acyclic Graphs as both a mathematical structure and a technological cornerstone.

Database Systems for Advanced Applications

The three-volume set LNCS 12681-12683 constitutes the proceedings of the 26th International Conference on Database Systems for Advanced Applications, DASFAA 2021, held in Taipei, Taiwan, in April 2021. The total of 156 papers presented in this three-volume set was carefully reviewed and selected from 490 submissions. The topic areas for the selected papers include information retrieval, search and recommendation techniques; RDF, knowledge graphs, semantic web, and knowledge management; and spatial, temporal, sequence, and streaming data management, while the dominant keywords are network, recommendation, graph, learning, and model. These topic areas and keywords shed the light on the direction where the research in DASFAA is moving towards. Due to the Corona pandemic this event was held virtually.