[PDF] Top 20 Ontology Based Data Access via Ontop

... the Ontop OWL API and implement as Java application. Similarly, Ontop support only one data source at a time, we can extract data from multiple and heterogeneous data sources using ... See full document

... the data source D together with the mapping M often provide valuable infor- mation about the class of possible ABoxes over which the user CQ is ...the data comes from a universal table or a triple store, it ... See full document

... In this chapter, we give a brief and easy introduction to the theory and practice of OBDA with relational databases, assuming that the reader has some basic knowledge of description logic. Our plan is as follows. In ... See full document

... sensor data and use it to improve the predictive systems analysing live ...using data-dependent rules that are specific to individual sensors and ...employ ontology-based data ... See full document

... for data complexity and PS PACE -complete for combined complexity (even NP-complete if the arity of predicates is ...log data stored in databases as ...datalogMTL ontology for temporal con- cepts ... See full document

... geospatial data. A geospatial data query interface design should deal with the characteristics and difficulties faced in the elaboration of a DBMS interface and provide the specific geographic application ... See full document

... supply ontology lan- guages and query answering technologies for ontology-based data access (OBDA), a way of querying in- complete data sources that uses ontologies to provide ... See full document

... heterogeneous data sources not only needs complete data accessibility, but also it needs solving data heterogeneity between these data ...system based on ontology to semantically ... See full document

... Ontology-based data access (OBDA), one of the most promis- ing applications of description logics, has recently been touted as a key ingredient in data stream management systems [Cal- ... See full document

... We show that OBDA languages based on atomic queries capture CSPs (and general- izations thereof). The proofs employ the equivalences between OBDA languages and fragments of MDDlog that have already been ... See full document

... Abstract: Ontology and Semantic is considered to the next generation of web that benefits many different fields like bio-informatics, Data transformation & ...interaction via the assessments and ... See full document

... consistency based on a set of data agreed upon or commonly acceptable, shared by various datasets, and make them ...global ontology which extracts information from the local ontologies and provides a ... See full document

... With access to more normalized structured data free of multi-valued fields, it becomes possible to consider converting Bio2RDFdatasets into full-fledged OWL ...the data itself, as was demonstrated in ... See full document

... instance data is often time-dependent: em- ployment contracts come to an end, parliaments are elected, children are ...Temporal data can be modelled by pairs consisting of facts and their validity time; for ... See full document

... ditional data is stored and used for query ...the data may actually be extended, the DB engine can, for efficiency reasons, ...the data, ontology and mapping, or, in DB parlance, to chase the ... See full document

... with access to the data store via the use of a domain specific vocabulary of classes, ...schema via view definitions, called mappings; thus, technical details of the database schema are hidden ... See full document

... (including its subtypes: field , core and facility , and so both wellbore and well ) are modelled as instances of the topological_relationship association entity, which is represented as the table TOPOLOGICAL_REL . The ... See full document

... the data has to be exponential in the size of the input TBox, in the worst ...for data complexity (such as ALC and SHIQ, un- less PT IME = NP) necessarily involve an extension of the data that is ... See full document

... Nowadays Word Wide Web is a main resource which everyone uses to extract required information. The information on the Web is huge and unstructured. Search engines are examined to facilitate in formation extraction. Key ... See full document

... Big Data, it is useful to have a ...Big Data brings together data of great variety, arriving in increas- ing volumes, at high ...Big Data is made up of complex datasets, mostly from new ... See full document