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semQA: SPARQL with Idempotent Disjunction
The SPARQL LeftJoin abstract operator is not distributive over Union; this limits the algebraic manipulation of graph patterns, which in turn restricts the ability to create query plans for distributed processing or query optimization. In this paper, we present semQA, an algebraic extension for the...
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| Main Authors: | , , , |
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| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado em: |
2009
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| Assuntos: | |
| Acesso em linha: | https://ncbi.nlm.nih.gov/pmc/articles/PMC2776754/ https://ncbi.nlm.nih.gov/pubmed/19915690 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1109/TKDE.2008.91 |
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