Furthermore, the use of the multidimensional data model is observed in four studies. It is assumed that this is derived from the increasing interest in DataWarehouses and DataMarts for Online Analytical Processing (OLAP), where the usage of ad-hoc queries is common. In addition, three papers propose the use of the XML model, which corresponds to an abstract representation of XML fragments. The other eight remaining works propose independent models, such as the Generic Data Model (GDM), the Graph Object Oriented Semi-Structured Data Model (GOOSSDM), Key-value, Novel Graphical Notation (NGN), Resource Description Framework (RDF), Tree and there are two works that do not propose any model.
Data Model at Logical Level
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Data Model at Conceptual Abstraction Level
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At the level of logical abstraction, according to the data obtained in the trend model is document-oriented with 12 studies, followed by graph-oriented and column-oriented, with seven studies each. As detailed in the Big Data Concepts subsection, there are four widely used models in NoSQL key-value: column-oriented, document-oriented and graph; however, key-value has been studied at this level of abstraction in just one proposal.