Hi, Jukka -- ** Jukka Villstedt [2007/03/13 11:52 PM +0200] wrote: >> I'm wondering if Virtuoso Open Source Edition supports distributed >> SPARQL queries over many Virtuoso databases. I've understood that >> virtual databases are included only in the commercial edition. >> >> I would like to make it easy to build personal data spaces and to >> set up communities by connecting these data spaces together by a >> query engine that can run distributed queries over the all of the >> dataspaces in the community. An example of such a community would >> be a group of web shops that want to provide a unified product >> catalog. Another example might be a group calendar for the members >> of some project. Setting up such a community should be a matter of >> telling the URI:s of the data spaces to the query engine. Assuming >> that the data is expressed in compatible ontologies. >> >> What do you think about this kind of approach to Semantic Web >> communities and does Virtuoso support this?
* Kingsley Idehen [2007/03/13 11:38 PM -0400] wrote: > At the current time you can send SPARQL Queries to Virtuoso and non > Virtuoso endpoints without issue. What is missing is intelligent > federation of sparql :-) This availability of this intelligent > federation/virtualization via Open Source is undecided at the > current time. It is perhaps worth noting that multiple data spaces can be hosted within a single Virtuoso instance, thus removing the need for the federation on the level you describe here. Each shop-owner creates their dataspace, and the "mall"-owner handles the overall interface, including the SPARQL interface over all hosted dataspaces. (It should also be noted that a commercial enterprise of the sort described requires a commercial license anyway, whether using the VOS or proprietary distribution...) Also, a single commercial Virtuoso instance could be used to federate over multiple VOS instances (whether licensed commercially or not), through a myriad of ways. This is more complex to implement, but may be an effective and sufficiently low-cost solution. Optimal configuration may require more expensive licenses at any or every level. However, functional configurations may be achieved at low cost, or even at no cost while in development. Regards, Ted -- A: Yes. http://www.guckes.net/faq/attribution.html | Q: Are you sure? | | A: Because it reverses the logical flow of conversation. | | | Q: Why is top posting frowned upon? Ted Thibodeau, Jr. // voice +1-781-273-0900 x32 Evangelism & Support // mailto:tthibod...@openlinksw.com OpenLink Software, Inc. // http://www.openlinksw.com/ http://www.openlinksw.com/weblogs/uda/ OpenLink Blogs http://www.openlinksw.com/weblogs/virtuoso/ http://www.openlinksw.com/blog/~kidehen/ Universal Data Access and Virtual Database Technology Providers
