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IGSQL: Database Schema Interaction Graph Based Neural Model for Context-Dependent Text-to-SQL Generation [article]

Yitao Cai, Xiaojun Wan
2020 arXiv   pre-print
The comparison and ablation results demonstrate the efficacy of our model and the usefulness of the database schema interaction graph encoder.  ...  In this work, in addition to using encoders to capture historical information of user inputs, we propose a database schema interaction graph encoder to utilize historicalal information of database schema  ...  We then propose a database schema interaction graph encoder to model database schema items together with historical items.  ... 
arXiv:2011.05744v1 fatcat:kkdn7ftxarckhh3pzlvgk3r6va

IGSQL: Database Schema Interaction Graph Based Neural Model for Context-Dependent Text-to-SQL Generation

Yitao Cai, Xiaojun Wan
2020 Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP)   unpublished
The comparison and ablation results demonstrate the efficacy of our model and the usefulness of the database schema interaction graph encoder.  ...  In this work, in addition to using encoders to capture historical information of user inputs, we propose a database schema interaction graph encoder to utilize historicalal information of database schema  ...  We then propose a database schema interaction graph encoder to model database schema items together with historical items.  ... 
doi:10.18653/v1/2020.emnlp-main.560 fatcat:vdkvy7swofaivn4cp5ohr7ca2q

Modelling of Graph Databases

Jaroslav Pokorny
2017 Journal of Advanced Engineering and Computation  
We propose a sufficient conceptual model based on a binary variant of the ER model and show its relationship to a graph database model, i.e. a mapping conceptual schemas to database schemas.  ...  Particularly, a graph database schema including integrity constraints is mostly not explicitly defined, also a conceptual modelling is not used.  ...  Graph database modelling In a native graph database model, both the schema and its instances are modelled as graphs. Nodes and edges are rst-class citizens.  ... 
doi:10.25073/jaec.201711.44 fatcat:xpwbge52wngojlusmzvnnfhqie

Direct Mappings between RDF and Property Graph Databases [article]

Harsh Thakkar, Renzo Angles, Dominik Tomaszuk, Jens Lehmann
2019 arXiv   pre-print
Resource Description Framework (RDF) triplestores and Property Graph (PG) database systems are two approaches for data management that are based on modeling, storing and querying graph-like data.  ...  Specifically, we present two direct mappings (schema-dependent and schema-independent) for transforming an RDF database into a PG database.  ...  Generic Property Graph Schema First we introduce a Property Graph Schema which is able to model any RDF graph.  ... 
arXiv:1912.02127v1 fatcat:dmsi4wjrv5akxauvqnwvdeaqhy

A light weight approach for ontology generation and change synchronization between ontologies and source relational databases

Waqas Ahmed, Muhammad Ahtisham Aslam, Jun Shen, Jianming Yong
2011 Proceedings of the 2011 15th International Conference on Computer Supported Cooperative Work in Design (CSCWD)  
Most of industrial data is present in relational databases and a relational database schema represents a domain model.  ...  Once a database schema is changed, these changes in schema should also be incorporated in ontology, generated from this database.  ...  MR2 Class/subclass If Building Ontology from Conceptual Graph Model Once database schema is read and transformed into conceptual graph model, this graph model can be used to construct ontology.  ... 
doi:10.1109/cscwd.2011.5960076 dblp:conf/cscwd/AhmedASY11 fatcat:ygzbkwngsvg2pkqwbrrafunoki

Survey of graph database models

Renzo Angles, Claudio Gutierrez
2008 ACM Computing Surveys  
Graph database models can be defined as those in which data structures for the schema and instances are modeled as graphs or generalizations of them, and data manipulation is expressed by graph-oriented  ...  The main objective of this survey is to present the work that has been conducted in the area of graph database modeling, concentrating on data structures, query languages, and integrity constraints.  ...  In most models there is a separation between the database schema and the database instance.  ... 
doi:10.1145/1322432.1322433 fatcat:ecwpgcnb3jecjpizlzmm2ae2xu

The Typed Graph Model – a Supermodel for Model Management and Data Integration [article]

Fritz Laux
2021 arXiv   pre-print
In this paper, we propose a schema bound Typed Graph Model with properties and labels. These enhancements improve not only data quality but also the quality of graph analysis.  ...  We illustrate by example the superiority of this model over the property graph data model of Hidders and other prevalent data models, namely the relational, object-oriented, XML model, and RDF Schema.  ...  connect a graph schema with its graph database instance.  ... 
arXiv:2110.02021v2 fatcat:bljwxgu47zfwtel5msxxmyphi4

A Generator for Graph-Based Design Representations [chapter]

Ansgar Bredenfeld
1995 Electronic Design Automation Frameworks  
This extended model is used as basis for a new tool integration service. It provides a schema-driven code generator for implementations of graph-based design representations.  ...  We extend an object model comparable to existing ones by an abstract graph model which reflects structures and functionality occurring in various graph-based design representations.  ...  This approach will further close the still existing semantic gap between database models and the often graph-based conceptual model of design tools.  ... 
doi:10.1007/978-0-387-34880-3_24 fatcat:jlldxuvsefcpzorj5nzdribbzi

RDF and Property Graphs Interoperability: Status and Issues

Renzo Angles, Harsh Thakkar, Dominik Tomaszuk
2019 Alberto Mendelzon Workshop on Foundations of Data Management  
RDF and Property Graph databases are two approaches for data management that are based on modeling, storing and querying graph-like data.  ...  Both, RDF and graph database systems are tightly connected as they are based on graph-oriented database models.  ...  Property graph databases Most of the current graph database systems have been designed to support the property graph data model.  ... 
dblp:conf/amw/AnglesTT19 fatcat:euptkzr7nzcmzjbhejemlkiuei

Adding structure to unstructured data [chapter]

Peter Buneman, Susan Davidson, Mary Fernandez, Dan Suciu
1997 Lecture Notes in Computer Science  
We develop notions of conformance between a graph database and a graph schema and show that there is a natural and ei:iiciently computable ordering on graph schemas.  ...  Here, we propose that both data and schema be represented as edge-labeled graphs.  ...  Determinism for graph schemas in any model, however, is natural.  ... 
doi:10.1007/3-540-62222-5_55 fatcat:sci245jkanfzpa3wbdtsdjdft4

A New Algorithm for Storing and Migrating Data Modelled by Graphs

Zakariyaa Ait El Mouden, Abdeslam Jakimi
2020 International Journal of Online and Biomedical Engineering (iJOE)  
This paper presents an algorithm to store data modeled by graphs as NoSQL documents, the purpose of this study is to exploit the high amount of data stored in SQL databases and to make such data usable  ...  In term of variety, NoSQL databases store heterogeneous data without being obliged to respect a predefined schema such as the case of relational and object-relational databases.  ...  Many algorithms and approaches were developed to convert between schemas, models or databases.  ... 
doi:10.3991/ijoe.v16i11.15545 fatcat:p2uoo3fydrbx3crylanhfulkom

Hecataeus: A Framework for Representing SQL Constructs as Graphs

George Papastefanatos, Kostis Kyzirakos, Panos Vassiliadis, Yannis Vassiliou
2005 International Working Conference on Exploring Modeling Methods for Systems Analysis and Development  
In this paper, we first introduce and sketch a graph-based model that captures relations, views, constraints and queries.  ...  Traditional modeling techniques typically focus on the static part of databases and ignore their dynamic part (e.g., queries or data-centric workflows).  ...  -The Graph Manager component is responsible for representing the underlying database schema and the parsed queries in the proposed graph model.  ... 
dblp:conf/emmsad/PapastefanatosK05 fatcat:xjdt4ra4qvejtdi2yilgxzz77i

Functional querying in graph databases

Jaroslav Pokorný
2017 Vietnam Journal of Computer Science  
An attention is devoted to functional modelling of graph databases both at a conceptual and data level. The notions of graph conceptual schema and graph database schema are considered.  ...  The paper is focused on a functional querying in graph databases. We consider labelled property graph model and mention also the graph model behind XML databases.  ...  Modelling graph data based on XML format The simplest way how to model XML data on the database schema level is given by the language DTD.  ... 
doi:10.1007/s40595-017-0104-6 fatcat:4xusr7crzvcvbl2rdgnd6frfmu

Functional Querying in Graph Databases [chapter]

Jaroslav Pokorný
2017 Lecture Notes in Computer Science  
An attention is devoted to functional modelling of graph databases both at a conceptual and data level. The notions of graph conceptual schema and graph database schema are considered.  ...  The paper is focused on a functional querying in graph databases. We consider labelled property graph model and mention also the graph model behind XML databases.  ...  Modelling graph data based on XML format The simplest way how to model XML data on the database schema level is given by the language DTD.  ... 
doi:10.1007/978-3-319-54472-4_28 fatcat:rx5s23v6dzca3grshhegtkx55i

Building Methods of Intelligent Data Catalog Based on Graph Database for Data Sharing Platform

Mi-Young Choi, Chang-Joo Moon, Sung-Jae Jung
2020 Innovative Computing Information and Control Express Letters, Part B: Applications  
We show the process of transferring the proposed data catalog from the relational data model to the graph data model.  ...  In this paper, we propose a method to build a data catalog based on a graph database.  ...  Relational data model and graph data model for RDBMS schema Figure 5 . 5 Figure 5.  ... 
doi:10.24507/icicelb.11.10.953 fatcat:2s6xcugsxrba7houcw3t564moi
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