Results 41 to 50 of about 2,551,481 (193)
Data Model and Query Constructs for Versatile Web Query Languages [PDF]
, 2006 As the Semantic Web is gaining momentum, the need for truly versatile query languages becomes increasingly apparent. A Web query language is called versatile if it can access in the same query program data in different formats (e.g. XML and RDF). Most
Furche, Tim +5 more
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IB-CBB: an improved spatial index considering intersection based on clipped bounding boxes
Annals of GISEfficiently querying multiple spatial datasets is a challenging task in geoscience. The majority of spatial processing techniques use minimum bounding box (MBB) to approximate neighbouring spatial objects and and place them adjacent in the spatial index.
Wei Xiong +3 more
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Sensors, 2015 A content-matched (CM) rangemonitoring query overmoving objects continually retrieves the moving objects (i) whose non-spatial attribute values are matched to given non-spatial query values; and (ii) that are currently located within a given spatial ...
HaRim Jung +3 more
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Spatial queries in sensor networks [PDF]
Proceedings of the 13th annual ACM international workshop on Geographic information systems, 2005 Recent advances in low-power sensing devices coupled with the widespread availability of wireless ad-hoc networks have fueled the development of sensor networks. These are typically deployed over wide areas to gather data in the environment and monitor events of interest.
Amir Soheili +2 more
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On Nearby-Fit Spatial Keyword Queries [PDF]
IEEE Transactions on Knowledge and Data Engineering, 2020 Geo-textual data is ubiquitous nowadays, where each object has a location and is associated with some keywords. Many types of queries based on geo-textual data, termed as spatial keyword queries , have been proposed, and are to find optimal object(s) in terms of both its (their) location(s) and keywords.
Victor Junqiu Wei +3 more
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RESEARCH ON EXTENSION OF SPARQL ONTOLOGY QUERY LANGUAGE CONSIDERING THE COMPUTATION OF INDOOR SPATIAL RELATIONS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015 A method suitable for indoor complex semantic query considering the computation of indoor spatial relations is provided According to the characteristics of indoor space. This paper designs ontology model describing the space related information of humans,
C. Li, X. Zhu, W. Guo, Y. Liu, H. Huang
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Spatial queries in dynamic environments [PDF]
ACM Transactions on Database Systems, 2003 Conventional spatial queries are usually meaningless in dynamic environments since their results may be invalidated as soon as the query or data objects move. In this paper we formulate two novel query types, time parameterized and continuous queries , applicable in such environments.
Yufei Tao 0001, Dimitris Papadias
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Web and Semantic Web Query Languages [PDF]
, 2005 A number of techniques have been developed to facilitate powerful data retrieval on the Web and Semantic Web. Three categories of Web query languages can be distinguished, according to the format of the data they can retrieve: XML, RDF and Topic Maps.
Furche, Tim +7 more
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Information, 2018 Faced with the rapid growth of vector data and the urgent requirement of low-latency query, it has become an important and timely challenge to effectively achieve the scalable storage and efficient access of vector big data.
Hua Jiang +6 more
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Collective spatial keyword querying [PDF]
Proceedings of the 2011 ACM SIGMOD International Conference on Management of data, 2011 With the proliferation of geo-positioning and geo-tagging, spatial web objects that possess both a geographical location and a textual description are gaining in prevalence, and spatial keyword queries that exploit both location and textual description are gaining in prominence.
Xin Cao 0001 +3 more
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