. "VirtTipsAndTricksGuideDropCreateDefaultStrg" . . . "VirtTipsAndTricksGuideDropCreateDefaultStrg" . . "%META:TOPICPARENT{name=\"VirtTipsAndTricksGuide\"}%\n\n---++Can I drop and re-create the DefaultQuadStorage?\n\nCurrently system metadata consist of three \"levels\":\n\n 1 QuadMapFormats are used to describe transformations of individual SQL values (or types of SQL values), \n 1 QuadMaps refers to QuadMapFormats (via QuadMapValues) and describe some \"minimal\" independent RDB2RDF transformations,\n 1 QuadStorages organizes QuadMaps. \n\n\nQuadStorages contains only \"symlinks\" to maps, if you drop a storage you don't drop all mappings inside.\nIf you drop the DefaultQuadStorage or some other built-in thing, it can be safely recovered by [[http://docs.openlinksw.com/virtuoso/fn_rdf_audit_metadata.html][DB.DBA.RDF_AUDIT_METADATA]], with first parameter set to 1. This will keep your own data intact. However we recommend to write a script that declares all your formats, Linked Data Views and storages, to be able to reproduce the configuration after any failures.\n\n---+++Related\n \n * [[VirtTipsAndTricksGuide][Virtuoso Tips and Tricks Collection]]\n * [[http://docs.openlinksw.com/virtuoso/rdfsparql.html][SPARQL]]" . . . . . . . . . "2017-06-13T05:36:50Z" . . . . . . "2017-06-13T05:36:50Z" . . "VirtTipsAndTricksGuideDropCreateDefaultStrg" . "dd199e529423f6edb2c8bd69ae447bb9" . . "2017-06-13T05:36:50.629922"^^ . "2017-06-13T05:36:50.629922"^^ . . .