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    • MDBE: Automatic Multidimensional Design 

      Romero Moral, Óscar; Abelló Gamazo, Alberto (Springer, 2008)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The goal of this demonstration is to present MDBE, a tool implementing our methodology for automatically deriving multidimensional schemas from relational sources, bearing in mind the end-user requirements. Our approach ...

    • MDBE: una herramienta automática para el modelado multidimensional 

      Romero Moral, Óscar; Abelló Gamazo, Alberto (Thomson Paraninfo, 2007)
      Comunicació de congrés
      Accés obert
      Los sistemas Data Warehousing tienen como objetivo ayudar en la toma de decisiones de las organizaciones. Para ello, estos sistemas inte­gran y homogenizan los datos de la organiza­ción en un Data Warehouse (DW), con el ...

    • MDM: governing evolution in big data ecosystems 

      Nadal Francesch, Sergi; Abelló Gamazo, Alberto; Romero Moral, Óscar; Vansummeren, Stijn; Vassiliadis, Panos (OpenProceedings, 2018)
      Comunicació de congrés
      Accés obert
      On-demand integration of multiple data sources is a critical requirement in many Big Data settings. This has been coined as the data variety challenge, which refers to the complexity of dealing with an heterogeneous set ...

    • Multidimensional integration of RDF datasets 

      Behan, Jam Jahanzeb Khan; Romero Moral, Óscar; Zimányi, Esteban (Springer, 2019)
      Comunicació de congrés
      Accés obert
      Data providers have been uploading RDF datasets on the web to aid researchers and analysts in finding insights. These datasets, made available by different data providers, contain common characteristics that enable their ...

    • NOSQL design for analytical workloads: Variability matters 

      Herrero Otal, Víctor; Abelló Gamazo, Alberto; Romero Moral, Óscar (Springer, 2016)
      Text en actes de congrés
      Accés obert
      Big Data has recently gained popularity and has strongly questioned relational databases as universal storage systems, especially in the presence of analytical workloads. As result, co-relational alternatives, commonly ...

    • ODIN: A dataspace management system 

      Nadal Francesch, Sergi; Rabbani, Kashif; Romero Moral, Óscar; Nigatu, Shumet Tadesse (CEUR-WS.org, 2019)
      Comunicació de congrés
      Accés obert
      ODIN is a system that supports the incremental pay-as-you-go integration of data sources into dataspaces and provides user-friendly querying mechanisms on top of them. We describe its main characteristics and underlying ...

    • On the mismatch between multidimensionality and SQL 

      Romero Moral, Óscar; Abelló Gamazo, Alberto (2006-06)
      Report de recerca
      Accés obert
      ROLAP tools are intended to ease information analysis and navigation through the whole Data Warehouse. These tools automatically generate a query according to the multidimensional operations performed by the end-user, using ...

    • On-line analytical processing 

      Abelló Gamazo, Alberto; Romero Moral, Óscar (Springer, 2017-01-21)
      Capítol de llibre
      Accés obert
      On-line analytical processing (OLAP) describes an approach to decision support, which aims to extract knowledge from a data warehouse, or more specifically, from data marts. Its main idea is providing navigation through ...

    • Open access semantic aware business intelligence 

      Romero Moral, Óscar; Abelló Gamazo, Alberto (Springer, 2013)
      Text en actes de congrés
      Accés obert
      The vision of an interconnected and open Web of data is, still, a chimera far from being accomplished. Fortunately, though, one can find several evidences in this direction and despite the technical challenges behind such ...

    • Operationalizing and automating data governance 

      Nadal Francesch, Sergi; Jovanovic, Petar; Bilalli, Besim; Romero Moral, Óscar (Springer Nature, 2022-12-10)
      Article
      Accés obert
      The ability to cross data from multiple sources represents a competitive advantage for organizations. Yet, the governance of the data lifecycle, from the data sources into valuable insights, is largely performed in an ...

    • Programació pràctica en C++ 

      Gatius Vila, Marta; López Herrera, Josefina; Martín Prat, Àngela; Romero Moral, Óscar; Valverde Ruiz, Alfonso; Xhafa Xhafa, Fatos; Esquerra Llucià, Ignasi; Amirian Basiri, Gerard (Edicions UPC, 2010)
      Llibre
      Accés restringit als usuaris de la UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC
      L'objectiu d'aquest llibre és introduir el lector en la programació, facilitant-li l'aprenentatge dels conceptes fonamentals de programació i d'un dels llenguatges amb més projecció (el C++). Alhora, volem potenciar les ...

    • QB2OLAP : enabling OLAP on statistical linked open data 

      Varga, Jovan; Etcheverry, Lorena; Vaisman, Alejandro; Romero Moral, Óscar; Bach Pedersen, Torben; Thomsen, Christian (2016)
      Text en actes de congrés
      Accés obert
      Publication and sharing of multidimensional (MD) data on the Semantic Web (SW) opens new opportunities for the use of On-Line Analytical Processing (OLAP). The RDF Data Cube (QB) vocabulary, the current standard for ...

    • Quarry 

      Abelló Gamazo, Alberto; Romero Moral, Óscar; Jovanovic, Petar; Nadal Francesch, Sergi; Bilalli, Besim; Candón Arenas, Héctor; Mayorova, Daria; Thavornun, Varunya; Gil González, Daniel (2015-07-01)
      Programari
      Accés restringit per acord de confidencialitat

    • Quarry : digging up the gems of your data treasury 

      Jovanovic, Petar; Romero Moral, Óscar; Simitsis, Alkis; Abelló Gamazo, Alberto; Candón Arenas, Héctor; Nadal Francesch, Sergi (2015)
      Comunicació de congrés
      Accés obert
      The design lifecycle of a data warehousing (DW) system is primarily led by requirements of its end-users and the complexity of underlying data sources. The process of designing a multidimensional (MD) schema and back-end ...

    • Quarry: A user-centered big data integration platform 

      Jovanovic, Petar; Nadal Francesch, Sergi; Romero Moral, Óscar; Abelló Gamazo, Alberto; Bilalli, Besim (2021-02)
      Article
      Accés obert
      Obtaining valuable insights and actionable knowledge from data requires cross-analysis of domain data typically coming from various sources. Doing so, inevitably imposes burdensome processes of unifying different data ...

    • Relational Extensions : Object-Relational and XML Extensions 

      Romero Moral, Óscar; García, Roberto; Gil Iranzo, Rosa M. (Universitat Politècnica de Catalunya, 2012)
      Apunts
      Accés obert

    • Requirement-driven creation and deployment of multidimensional and ETL designs 

      Jovanovic, Petar; Romero Moral, Óscar; Simitsis, Alkis; Abelló Gamazo, Alberto (Springer, 2012)
      Text en actes de congrés
      Accés obert
      We present our tool for assisting designers in the error-prone and time-consuming tasks carried out at the early stages of a data warehousing project. Our tool semi-automatically produces multidimensional (MD) and ETL ...

    • Resilient store: a heuristic-based data format selector for intermediate results 

      Munir, Rana Faisal; Romero Moral, Óscar; Abelló Gamazo, Alberto; Bilalli, Besim; Thiele, Maik; Lehner, Wolfgang (2016)
      Número de revista
      Accés obert
      Large-scale data analysis is an important activity in many organizations that typically requires the deployment of data-intensive workflows. As data is processed these workflows generate large intermediate results, which ...

    • Semantic web technologies for business intelligence 

      Berlanga, Rafael; Romero Moral, Óscar; Simitsis, Alkis; Nebot, Victoria; Pedersen, Torben; Abelló Gamazo, Alberto; Aramburu, María José (IGI Global, 2011)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This chapter describes the convergence of two of the most influential technologies in the last decade, namely business intelligence (BI) and the Semantic Web (SW). Business intelligence is used by almost any enterprise to ...

    • Service Oriented Business Intelligence 

      Abelló Gamazo, Alberto; Romero Moral, Óscar (Universitat Politècnica de Catalunya, 2013)
      Apunts
      Accés obert