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		| Paper: | 
		The Astronomical Virtual Observatory: Lessons Learned, Looking Forward | 
	 
	
		| Volume: | 
		461, Astronomical Data Analysis Software and Systems XXI | 
	 
	
		| Page: | 
		247 | 
	 
	
		| Authors: | 
		Genova, F. | 
	 
	
	
		| Abstract: | 
		The astronomical Virtual Observatory (VO) aims at providing 
 seamless access to the wealth of the discipline's on-line resources, hence at
 developing global interoperability between them. This is coordinated by the
 International Virtual Observatory Alliance (IVOA). The paper summarizes the VO
 history and current evolution.
 
 During the first period of VO development, a huge amount of work has been
 devoted to the development of basic interoperability standards, to set up the VO
 framework for publication of data and for tools interoperability. This has
 proven to be a major asset for seamless usage of data. Now the VO is in
 operation, and the emphasis on supporting the take-up by astronomers and data
 providers, as well as on outreach, is increasing. A census of European
 astronomical data centres performed in 2009/2010 shows a large interest in the 
 VO, and a wide diversity of sizes and organisations, in the data centre
 community.
 
 The different strands of work of an operational VO, and the challenges ahead are
 described, taking in particular the example of the European VO. The European
 implementation of the VO has been moulded by the specific organisation of
 European astronomy, with complementary roles of the national and European
 levels. Local and national projects contribute to the VO development and
 implementation in their domains of interest and expertise. Several projects
 supported by the European Commission have helped to shape Euro-VO, with a strong
 emphasis on coordination of national and intergovernmental agency projects, with
 actions towards astronomers, data centres and VO developers, including during
 the last period of outreach towards education and the public. The Astronet
 Infrastructure Roadmap for European astronomy (2009) has recognized data and the
 VO as one of the infrastructures of astronomy. The way forward in this context
 is discussed. In conclusion, the astronomical data infrastructure is put in
 perspective with the general trends around scientific data. | 
	 
	
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