scholarly journals Information Model and XML Data Model for Traceroute Measurements

2008 ◽  
Author(s):  
S. Niccolini ◽  
S. Tartarelli ◽  
J. Quittek ◽  
T. Dietz ◽  
M. Swany
Keyword(s):  
Data Model ◽  
Information Model ◽  
Xml Data

Extended Tuple Constraint Type in Relational and XML Data Model

2017 ◽  
Author(s):  
Jovana Vidaković ◽  
Sonja Ristić ◽  
Slavica Kordić ◽  
Ivan Luković
Keyword(s):  
Data Model ◽  
Xml Data

scholarly journals XPath-logic and XPathLog: A logic-programming style XML data manipulation language

2004 ◽  
Vol 4 (3) ◽  
pp. 239-287 ◽  
Author(s):  
WOLFGANG MAY
Keyword(s):  
Logic Programming ◽  
Data Model ◽  
Formal Semantics ◽  
Xml Data ◽  
First Order ◽  
Answer Set Semantics ◽  
Manipulation Language ◽  
Horn Fragment ◽  
Main Language

We define XPathLog as a Datalog-style extension of XPath. XPathLog provides a clear, declarative language for querying and manipulating XML whose perspectives are especially in XML data integration. In our characterization, the formal semantics is defined wrt. an edge-labeled graph-based model, which covers the XML data model. We give a complete, logic-based characterization of XML data and the main language concept for XML, XPath. XPath-Logic extends the XPath language with variable bindings and embeds it into first-order logic. XPathLog is then the Horn fragment of XPath-Logic, providing a Datalog-style, rule-based language for querying and manipulating XML data. The model-theoretic semantics of XPath-Logic serves as the base of XPathLog as a logic-programming language, whereas also an equivalent answer-set semantics for evaluating XPathLog queries is given. In contrast to other approaches, the XPath syntax and semantics is also used for a declarative specification how the database should be updated: when used in rule heads, XPath filters are interpreted as specifications of elements and properties which should be added to the database.

scholarly journals A Formal Approach of Construction Fuzzy XML Data Model Based on OWL 2 Ontologies

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 22025-22033 ◽  
Author(s):  
Weijun Li ◽  
Li Yan ◽  
Fu Zhang ◽  
Xu Chen
Keyword(s):  
Data Model ◽  
Formal Approach ◽  
Xml Data ◽  
Model Based ◽  
Fuzzy Xml

An XML Data Model for Inverted Image Indexing

2003 ◽  
Author(s):  
Simon W. So ◽  
Clement H. C. Leung ◽  
Philip K. C. Tse
Keyword(s):  
Data Model ◽  
Image Indexing ◽  
Xml Data

scholarly journals Extended tuple constraint type as a complex integrity constraint type in XML data model - definition and enforcement

2018 ◽  
Vol 15 (3) ◽  
pp. 821-843
Author(s):  
Jovana Vidakovic ◽  
Sonja Ristic ◽  
Slavica Kordic ◽  
Ivan Lukovic
Keyword(s):  
Data Model ◽  
Relational Databases ◽  
Database Management System ◽  
Integrity Constraints ◽  
Relational Data ◽  
Integrity Constraint ◽  
Xml Data ◽  
Relational Data Model ◽  
Unique Constraint ◽  
Schema Languages

A database management system (DBMS) is based on a data model whose concepts are used to express a database schema. Each data model has a specific set of integrity constraint types. There are integrity constraint types, such as key constraint, unique constraint and foreign key constraint that are supported by most DBMSs. Other, more complex constraint types are difficult to express and enforce and are mostly completely disregarded by actual DBMSs. The users have to manage those using custom procedures or triggers. eXtended Markup Language (XML) has become the universal format for representing and exchanging data. Very often XML data are generated from relational databases and exported to a target application or another database. In this context, integrity constraints play the essential role in preserving the original semantics of data. Integrity constraints have been extensively studied in the relational data model. Mechanisms provided by XML schema languages rely on a simple form of constraints that is sufficient neither for expressing semantic constraints commonly found in databases nor for expressing more complex constraints induced by the business rules of the system under study. In this paper we present a classification of constraint types in relational data model, discuss possible declarative mechanisms for their specification and enforcement in the XML data model, and illustrate our approach to the definition and enforcement of complex constraint types in the XML data model on the example of extended tuple constraint type.

Application of IEC61850-80-1 in Peer-to-Peer Communication between Feeder Terminal Units

2012 ◽  
Vol 614-615 ◽  
pp. 1401-1404
Author(s):  
Qing Hua Shao ◽  
Xiao Li Wang ◽  
Bing Liu ◽  
Zhong Hua Yan ◽  
Ping Jiang
Keyword(s):  
Data Model ◽  
Information Exchange ◽  
Automatic System ◽  
Information Model ◽  
Peer To Peer ◽  
Peer Communication ◽  
Time Performance ◽  
Terminal Unit ◽  
Feeder Terminal Unit ◽  
Long Time

The trend towards using IEC61850 standards in feeder terminal unit (FTU) design is inexorable, but at present in China, IEC60870-5-104 is mostly used in distribution automatic system (DAS) information exchange. Thus it can be seen that IEC61850 standard will coexist with IEC60870-5 standard for a long time. IEC61850-80-1 provides the method of exchanging information from IEC61850 CDC-based data model using IEC60870-5-101 or IEC60870-5-104. This paper makes a brief analysis on the structure of DAS based on IEC61850, proposes the information model of FTU in accordance to IEC61850 and maps the information model to IEC60870-5-104 using IEC61850-80-1, which takes the advantage of IEC60870-5-104’s excellent real-time performance to realize peer-to-peer communication between FTUs.

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