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Community-driven ontology evolution based on folksonomies

... groups of experts, actual ontology users are not involved in the development process. Such an individual approach in creating ontologies, lead to a weak community grounding. On the other hand, ...

Publication - cat - 04/17/2013 - 03:27 - 0 comments - 1 attachment

Nested Mappings: Schema Mapping Reloaded

... 666.47 KB Many problems in information integration rely on specifications, called schema mappings, that ... for both relational and nested data are well-known. In this work, we present a new formalism for schema mapping that extends these existing formalisms in two significant ways. First, our nested mappings allow for nesting and ...

Publication - huliganka - 04/17/2013 - 00:05 - 0 comments - 1 attachment

Schema Versioning in Data Warehouses: Enabling Cross-Version Querying via Schema Augmentation?

... warehousing systems are fully operational, a crucial role in preserving their up-to-dateness is played by the ability to manage the ... that the data warehouse (DW) schema undergoes over time in response to evolving business requirements. In this paper we propose an ...

Publication - cat - 04/16/2013 - 22:05 - 0 comments - 1 attachment

Model-Independent Schema and Data Translation

... data: given a source instance I of a schema S expressed in a source model, and a target model TM, it generates a schema S0 expressed in TM that is “equivalent” to S and an instance I0 of S0 “equivalent” ...

Publication - cat - 04/16/2013 - 03:38 - 0 comments - 1 attachment