Titlebook: Semantic Search over the Web; Roberto De Virgilio,Francesco Guerra,Yannis Velegr Book 2012 Springer-Verlag Berlin Heidelberg 2012 Linked D

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Interactive Query Construction for Keyword Search on the Semantic Webnteractive process where the user expresses and refines his intention in a few steps until the desired intent is met. In that way, we combine the intuitiveness of keyword search with the expressiveness of semantic queries to satisfy users’ information needs.

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Understanding the Semantics of Keyword Queries on Relational Data Without Accessing the Instance of keywords and they will have to be translated into structured queries in order to be executed. Existing works have exploited the instance data in order to build off-line an index that is used at query time to drive the translation. This idea is not always possible to implement since the owner of

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Semantic Link Discovery over Relational Dataments to queries that can run over relational data sources, potentially using semantic information (such as a class hierarchy or a more general ontology) to enhance the recall of the link discovery. We show that this framework is flexible enough to permit linking real data, including dirty data (whi

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Embracing Uncertainty in Entity Linkingefine a generic data model suitable for representing the entity and linkage information as this is generated by a number of the existing entity linkage techniques. Entities are compiled on the fly, by effectively processing the incoming query over the representation model, and thus, query answers re

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The Return of the Entity-Relationship Model: Ontological Query Answeringng w.r.t. the instance size is crucial. A key notion that ensures tractability in ..schemata is ., i.e., the absence of interaction between the functional participation constraints and the other constructs. We provide a precise syntactic characterization of separable ..schemata by means of a necessa