[PDF] Top 20 Query rewriting over shallow ontologies
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Query rewriting over shallow ontologies
... polynomial-size rewriting for the price of polynomially-many additional existential quantifiers over a domain with at least two constants (thus confirming once again that formalisms with nondeterminism are ... See full document
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On the succinctness of query rewriting over shallow ontologies
... x) over (T , A), we can first compute an FO-rewriting q 0 (~ x) of q and T , and then evaluate it over any given data A using, for example, a relational database management ...convenient query ... See full document
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Exponential lower bounds and separation for query rewriting
... real-world ontologies can be classified efficiently despite the high worst-case complexity of the clas- sification ...practical query answering over OWL 2 QL ontologies can be feasible if ... See full document
13
Polynomial conjunctive query rewriting under unary inclusion dependencies
... world ontologies, but then more research is needed to support this ...because query answering is P -complete for data complexity in them (note, however, that it is P -complete for primitive combined ... See full document
16
Query rewriting under linear EL knowledge bases
... work. Query rewriting has been extensively employed in query answering under ontologies [10, 16, ...resolution-based query rewriting algorithm for DL-Lite+ ontologies ... See full document
16
Query Rewriting Using Monolingual Statistical Machine Translation
... or ontologies of nouns or verbs has been ...or ontologies, we apply NLP ideas to IR ...of query expansion by query ...original query in order to increase the chances of matching words ... See full document
14
Query answering on expressive Datalog+/ ontologies
... In this section, we propose an algorithm based on a hybrid approach that com- bines the grounding of specific variables in rules with the query rewriting al- gorithm from [3]. Given a set of WS rules Σ and ... See full document
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Queries with negation and inequalities over lightweight ontologies
... (UCQs) over OWL 2 QL ontolo- gies is in AC 0 in data complexity, which enables a pure query rewriting approach to query answering in this ...given query by including the knowledge pro- ... See full document
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Practical Query Rewriting for DL-Lite with Numerical Predicates
... Formal ontologies are useful to augment application data in order to be able to extract more consequences from the data by use of background knowledge than from a query over the plain data ... See full document
13
Utilization Of Query Rewriting Over Ontology Change: A Review
... test query and ...available query rewriting systems are unsound and/or incomplete, even on commonly used benchmark ...conjunctive query answering or entailment) ... See full document
8
On decidability and tractability of querying in temporal EL
... temporal query languages with atemporal ontologies [22, 25, 5, 9, 10], but some applications, such as managing data from sensor networks, require temporal aspects in conceptual modelling; hence, there is a ... See full document
14
Ranking Ontologies Based on Formal Concept Analysis
... ranking ontologies according to the inherent correlation among the same domain ontologies and the matches between query and ontology, but incompletely depending on the keywords input by ... See full document
7
Near real time statistics gathered from a continuous and voluminous data mutation stream
... Statistics are usually gathered in a dimension of time; old information (grad- ually) decreases in value [18]. That notion has been used to select which data should become immutable. For each table in the system an ... See full document
42
Peer based query rewriting in SPARQL for semantic integration of linked data
... a query rewriting algorithm that exploits the full semantics of our ...fect rewriting, another possible approach is to devise a rewriting algorithm that produces rewritten queries in a ... See full document
9
A Text-based Query Interface to OWL Ontologies
... the query (a chunk) between identified ...a query ’list cities located in Europe’, identified key concepts would be cities and Europe, the first referring to the class City, and the latter refer- ring to an ... See full document
8
PRL RR 11 pdf
... Then, all these syntaxes are formally related thanks to explicit correspondences. Following that, Section 3.3 shows that each syntax is endowed with a natural ordering. The terms are ordered by set-inclusion of their ... See full document
56
Characteristics of the Boolean Web search query: Estimating success from characteristics
... Web search engines are central to the Web browsing today. Popular web search engines index the information on the Web in a manner that allows the web searchers to quickly locate some information of interest to them most ... See full document
8
Integrated Tools for Query driven Development of Light weight Ontologies and Information Extraction Components
... and query-driven workflows have not gained as much attention in the UIMA community as, for example, pipeline management, rule development, or ...light-weight ontologies for in- formation extraction, that ... See full document
10
Ontology assisted query reformulation using the semantic and assertion capabilities of OWL DL ontologies
... Assisted Query Formulation Wizard”, is provided for this task which guides the user in defining the search conditions by making full use of the supporting domain ... See full document
10
Aligning Medical Domain Ontologies for Clinical Query Extraction
... The focus of the work reported by Zhang et al. (2004) is to compare two different alignment approaches that are applied to two different on- tologies about human anatomy. The subject on- tologies are the FMA and the ... See full document
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