What is the role of ontology in Hadoop?

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Chris Biemann

I agree w Samir: this question is very underspecified.

Alain Coletta

You might want to look into Giraph: https://giraph.apache.org/

This presentation "Handling RDF data with tools from the Hadoop ecosystem" (http://archive.apachecon.com/eu2012/presentations/07-Wednesday/L2L-Web_Infra/aceu-2012-handling-rdf-data-with-tools-from-the-hadoop-ecosystem.pdf) could give you some pointers. Paolo is a contributor to the giraph project.

Monika Rani

Thank you everyone for your reply , as my question is not clear i would like to add following details ....i wish to know how mapreduce (hadoop) phase is helpful for building ontology based search engine.

Thank you Samir Amir sir