Semantic web is a way to represent and manipulate informations that allows very high flexibility on the way the information are aggregated, accessed and presented. To leverage existing information base we need ways to get these information and translate them into a semantic form. There many standard ontologies broadly accepted like FOAF (for representing person data and person relationships), DOAP (for representing project data), Dublin Core (for representing document data) etc.... The act of transforming information from a proprietary format to a semantic representation is called rdf-alization. An ESB JBI can be the right integration middleware to perform this task because it can easily collect data in proprietary format from different sources and, by redefining rdf-alizers as JBI component, can feed semantic web enabled application.
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