All, An update to what I sent out yesterday. There are also two FAQs feeding off comments and discussions I've had with people offline. For example, why do some of my demos take so long to run etc.. The answer lies in understanding the degree to which SPARQL and PivotViewer have been integrated re. dynamic CXML generation. Example: I have a demo that uses the SPARQL endpoint at RPI as part of a 7-day earthquake tracking meshup [1]. The SPARQL in question is SPARQL-FED, and I've set no LIMIT on the resultset -- bar filters in the original query by the RPI team. As you can imagine, SPARQL-FED on its own is inherently challenging let alone incorporating that into a query pipeline that includes image process en route to final CXML generation and presentation in the browser. We address these uncontrollable variables by offering an "Edit" URL that places you inside a SPARQL query editor. Once you have the editor in scope you can alter the query to suit your needs. Of course you can also alter a variety of options that ultimately control the behavior of the Pivot page. Note: the LOD cloud cache will be offline for HTTP access for most of tomorrow. We are adding an additional 5 - 11 Billion triples (from various sources) to the 15 Billion currently in place. Links: 1. http://uriburner.com/c/DVMO43 -- 7-day earthquake tracking meshup 2. http://uriburner.com/PivotViewer/edit.vsp?url=http%3A%2F%2Furiburner.com%2Fc%2FDU2ZKL -- SPARQL query editor within PivotViewer page 3. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtVisualizeWithPivotViewer -- PivotViewer and Linked Data guide 4. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtSparqlCxmlFAQs#AncFaqPivotViewer -- FAQs 5. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtSparqlCxml -- SPARQL and dynamic CXML guide 6. http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtSparqlCxmlFAQs#AncFaqSparqlCxml -- FAQs -- Regards, Kingsley Idehen President& CEO OpenLink Software Web: http://www.openlinksw.com Weblog: http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca: kidehen
Received on Friday, 25 March 2011 19:57:24 UTC