Data integration: a theoretical perspective
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Header and Unit Inference for Spreadsheets Through Spatial Analyses
VLHCC '04 Proceedings of the 2004 IEEE Symposium on Visual Languages - Human Centric Computing
Implementing logic spreadsheets in less
The Knowledge Engineering Review
RDF123: From Spreadsheets to RDF
ISWC '08 Proceedings of the 7th International Conference on The Semantic Web
Dimension inference in spreadsheets
VLHCC '08 Proceedings of the 2008 IEEE Symposium on Visual Languages and Human-Centric Computing
Converting and annotating quantitative data tables
ISWC'10 Proceedings of the 9th international semantic web conference on The semantic web - Volume Part I
Mapping master: a flexible approach for mapping spreadsheets to OWL
ISWC'10 Proceedings of the 9th international semantic web conference on The semantic web - Volume Part II
DC proposal: graphical models and probabilistic reasoning for generating linked data from tables
ISWC'11 Proceedings of the 10th international conference on The semantic web - Volume Part II
Linked Data and multimedia: the state of affairs
Multimedia Tools and Applications
A publishing pipeline for linked government data
ESWC'12 Proceedings of the 9th international conference on The Semantic Web: research and applications
RightField: scientific knowledge acquisition by stealth through ontology-enabled spreadsheets
EKAW'12 Proceedings of the 18th international conference on Knowledge Engineering and Knowledge Management
Toward an ecosystem of LOD in the field: LOD content generation and its consuming service
ISWC'12 Proceedings of the 11th international conference on The Semantic Web - Volume Part II
Linked Data as Integrating Technology for Industrial Data
International Journal of Distributed Systems and Technologies
BauDataWeb: the Austrian building and construction materials market as linked data
Proceedings of the 9th International Conference on Semantic Systems
Towards evaluation and comparison of tools for ontology population from spreadsheet data
Proceedings of the 9th International Conference on Semantic Systems
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In this paper a novel approach is presented for generating RDF graphs of arbitrary complexity from various spreadsheet layouts. Currently, none of the available spreadsheet-to-RDF wrappers supports cross tables and tables where data is not aligned in rows. Similar to RDF123, XLWrap is based on template graphs where fragments of triples can be mapped to specific cells of a spreadsheet. Additionally, it features a full expression algebra based on the syntax of OpenOffice Calc and various shift operations, which can be used to repeat similar mappings in order to wrap cross tables including multiple sheets and spreadsheet files. The set of available expression functions includes most of the native functions of OpenOffice Calc and can be easily extended by users of XLWrap. Additionally, XLWrap is able to execute SPARQL queries, and since it is possible to define multiple virtual class extents in a mapping specification, it can be used to integrate information from multiple spreadsheets. XLWrap supports a special identity concept which allows to link anonymous resources (blank nodes) --- which may originate from different spreadsheets --- in the target graph.