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MAC: Conceptual data modeling for OLAP

Aris Tsois, Nikos Karayannidis, Timos K. Sellis
2001 Design and Management of Data Warehouses  
We view the problem from the end-user point of view and we describe a set of requirements for the conceptual modeling of realworld OLAP scenarios.  ...  In this paper we address the issue of conceptual modeling of data used in multidimensional analysis.  ...  MAC is a user-centric conceptual data model that attempts to cover the requirements described in the previous section in order to provide a highly expressive and intuitive modeling methodology for the  ... 
dblp:conf/dmdw/TsoisKS01 fatcat:jdtxkrifm5cj7cgpbyjrlitkfi

An MDA approach for developing secure OLAP applications: Metamodels and transformations

Carlos Blanco, Guzmán de, Eduardo Fernández-Medina, Juan Trujillo
2015 Computer Science and Information Systems  
This paper incorporates a proposal for developing secure OLAP applications within our previous approach: it improves a UML profile for conceptual modelling; it defines a logical metamodel for OLAP applications  ...  or Data Marts, based on multidimensional modelling.  ...  Transformation from Conceptual Models into Logical Models for OLAP Applications At the first stage we specify the transformation rules needed for the generation of logical models for secure OLAP applications  ... 
doi:10.2298/csis140617007b fatcat:wz4qavnt2jdz7djcye3e3j3p6e

Sub Table Based Access Security Model (STBAM) for OLAP Tools

Abid Sohail, Khalid Hassain
2013 International Journal of Computer and Communication Engineering  
OLAP tools use pre-aggregation mechanism to summarize data for fast evaluation of information. OLAP tools use DWH's data for summarization. OLAP tools summarize data structure called "data cube".  ...  The authors in [9] have proposed a data security model. This model is the inspiration of RBAC model and MAC Model. The security model is presented in steps. Each step is handled separately.  ... 
doi:10.7763/ijcce.2013.v2.266 fatcat:ac2u2oct5zfofmydjlghffloy4

Automatic Generation of Secure Multidimensional Code for Data Warehouses: An MDA Approach [chapter]

Carlos Blanco, Ignacio García-Rodríguez de Guzmán, Eduardo Fernández-Medina, Juan Trujillo, Mario Piattini
2008 Lecture Notes in Computer Science  
for a specific OLAP tool.  ...  We have proposed an MDA architecture to develop secure Data Warehouses which allows them to be modeled at different abstraction levels (business, conceptual, logical and code level).  ...  (ACA) model [17] which allows us to represent the main security requirements for the conceptual modeling of DWs, the SECDW metamodel.  ... 
doi:10.1007/978-3-540-88873-4_9 fatcat:nh2u2f7rqvdoji5ao6tt7bqiom

OLAP Cube-based Graph Approach for Bibliographic Data

Wararat Jakawat, Cécile Favre, Sabine Loudcher
2016 Conference on Current Trends in Theory and Practice of Informatics  
In order to take into account linked data in OLAP on networks, we propose a conceptual graph model to represent bibliographic networks. Then we propose graphs enriched by cubes.  ...  The ability of OLAP for analyzing classical data is clear. However it must be adapted to provide networked data by considering both nodes and edges.  ...  So we first presented a conceptual graph model to support OLAP on bibliographic networks.  ... 
dblp:conf/sofsem/JakawatFL16 fatcat:kboj4o5jevg7xestmj2x65s6au

An architecture for automatically developing secure OLAP applications from models

Carlos Blanco, Ignacio García-Rodríguez de Guzmán, Eduardo Fernández-Medina, Juan Trujillo
2015 Information and Software Technology  
Trujillo, An architecture for automatically developing Secure OLAP applications from models, Information and Software Technology (2014), doi: http://dx.defines and implements transformations from conceptual  ...  to logical models, and from logical models to the secure implementation into a specific OLAP tool (SQL Server Analysis Services).  ...  Transformation from Conceptual Models This section describes the transformation rules developed for generating logical models for secure OLAP applications (according to SECMDDW) from conceptual models  ... 
doi:10.1016/j.infsof.2014.10.008 fatcat:e755rjwhwfcjljf3z3pkvkankq

Development of a Decision Support System with the use of OLAP-Technologies in the National Terminological Information Environment

Rasim M. Alguliyev, Institute of Information Technology, Azerbaijan National Academy of Sciences 9A, B. Vahabzade Street, AZ1141, Baku, Azerbaijan, Gulnara Ch. Nabibayova, Afruz M. Gurbanova
2019 International Journal of Modern Education and Computer Science  
The article also presents the structure of the data warehouse and the OLAP-cube developed on its basis.  ...  and online analytical processing OLAP.  ...  The article [3] proposes a method of conceptual OLAP modeling of the subject field.  ... 
doi:10.5815/ijmecs.2019.06.05 fatcat:6xh2uis4erbwhfc3vqqdlobkqa

Dynamic Classification of Sensitivity Levels of Datawarehouse Based on User Profiles

Amina El ouazzani, Nouria Harbi, Hassan Badir
2016 International Journal of Database Management Systems  
In this direction, several propositions were made, but none are considered as a standard for access management to data warehouses.  ...  A data warehouse stores secret data about the privacy of individuals and important business activities. This makes access to this source a risk of disclosure of sensitive data.  ...  an access control and auditing model (ACA) specific for DW, based on two access management policies: MAC and RBAC.  ... 
doi:10.5121/ijdms.2016.8602 fatcat:du5dvfwynvcrnjhcncx2jfqvs4

OLAP Hierarchies: A Conceptual Perspective [chapter]

Elzbieta Malinowski, Esteban Zimányi
2004 Lecture Notes in Computer Science  
for them based on the ER model.  ...  A conceptual representation of hierarchies allows the designer to properly represent users' requirements in multidimensional modeling and offers a common vision of these hierarchies for conceptual modeling  ...  [20] propose the MAC model, which is used for modeling OLAP scenarios.  ... 
doi:10.1007/978-3-540-25975-6_34 fatcat:53bsy3muavc4bglbwd3y6vgvfu

Cube Algebra

Cristina Ciferri, Ricardo Ciferri, Leticia Gómez, Markus Schneider, Alejandro Vaisman, Esteban Zimányi
2013 International Journal of Data Warehousing and Mining  
The lack of an appropriate conceptual model for data warehouses and OLAP systems has led to the tendency to deploy logical models (for example, star, snowflake, and constellation schemas) for them as conceptual  ...  In this article, we propose a user-centric conceptual model for data warehouses and OLAP systems, called the Cube Algebra.  ...  ACKNOWLEGEMENTS Cristina and Ricardo Ciferri thank for the support of the following Brazilian research agencies: FAPESP, CNPq, CAPES, and FINEP. Leticia Gómez and  ... 
doi:10.4018/jdwm.2013040103 fatcat:kvarbejowbfcrc5m2r3xwcvg4u

Developing secure data warehouses with a UML extension

Eduardo Fernández-Medina, Juan Trujillo, Rodolfo Villarroel, Mario Piattini
2007 Information Systems  
In the past years, some proposals for representing main MD modeling properties at the conceptual level have been stated.  ...  Data Warehouses (DWs), Multidimensional (MD) Databases, and On-Line Analytical Processing Applications are used as a very powerful mechanism for discovering crucial business information.  ...  We would also like to thank the reviewers for their valuable comments, which have helped us improve this paper.  ... 
doi:10.1016/j.is.2006.07.003 fatcat:rqjtshxrf5ddxijqu3e67mcidu

The interrogation of the OLAP CUBE by using multidimensional analyses

Robert Gabriel DRAGOMIR
2011 Annals of Spiru Haret University Economic Series  
The first part of the paper deals with the dynamics of the business environment, a fact which triggers the necessity of the informatics systems for decision assistance.  ...  The second point of the paper is the presentation of the online analytical processing (OLAP).  ...  OLAP assures multidimensional conceptual views of the data.  ... 
doaj:c982afb4ad734469965649ff414a0a4d fatcat:oo4sduhdrfdmxm6sduvn7xjsc4

Securing Data Warehouses: A Semi-automatic Approach for Inference Prevention at the Design Level [chapter]

Salah Triki, Hanene Ben-Abdallah, Nouria Harbi, Omar Boussaid
2011 Lecture Notes in Computer Science  
In this paper, we propose an approach that, starting from the conceptual model of the data sources, assists the designer of the data warehouse in indentifying multidimensional sensitive data and those  ...  Inspired from development methods for information systems, the first way of securing a data warehouse has been treated in the literature during the early phases of the development cycle.  ...  The UML profile, called SECDW (Secure Data Warehouse), includes new types, stereotypes and tagged values to model the RBAC and MAC models.  ... 
doi:10.1007/978-3-642-24443-8_10 fatcat:cufqhdwemzdfbbdply44ht6jcy

Active Categorization of Sensibility Degrees of Datawarehouse Established on User Visibilities

Ayasha Siddiqua, Shaista Sabeer, Nivedita Soni
2017 International Journal of Advanced Research in Computer Science and Software Engineering  
In this centering, several suggestions were made, but none are conceived as a standard for access direction to data warehouses.  ...  , and then our system will automatically give the sensitivity level of each data warehouse component according to the permits granted to an object in the data warehouse.  ...  Eavis and Althamimi (2012) confronted an certification model repose on algebra particularly planned for OLAP.  ... 
doi:10.23956/ijarcsse/v7i1/01101 fatcat:6ksnyjbeu5ab3adzrpuidybetq

Describing Analytical Sessions Using a Multidimensional Algebra [chapter]

Oscar Romero, Patrick Marcel, Alberto Abelló, Verónika Peralta, Ladjel Bellatreche
2011 Lecture Notes in Computer Science  
With this aim, we present a novel approach for representing SQL analytical queries in terms of a multidimensional algebra, which better characterizes the analytical efforts of the user.  ...  Recent efforts to support analytical tasks over relational sources have pointed out the necessity to come up with flexible, powerful means for analyzing the issued queries and exploit them in decisionoriented  ...  We also thank Jovan Varga for his insights.  ... 
doi:10.1007/978-3-642-23544-3_17 fatcat:d7ya47fuizecnazcctvsquqlpy
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