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16.7.7.Generate Transient and/or Persistent Linked Data Views atop Remote Relational Data Sources Using Conductor
This section describes how you can generate R2RML Scripts from Linked Data Views, using the Virtuoso Conductor ODBC or JDBC accessible.
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Ensure you have installed Conductor conductor_dav.vad VAD package with version 1.32.38 or higher.
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Go to http://<cname>[:<port>]/conductor.
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Enter dba credentials.
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Go to Linked Data -> Views:
Figure16.74.Generating Transient and/or Persistent Linked Data Views
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Select Qualifier Demo:
Figure16.75.Generating Transient and/or Persistent Linked Data Views
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Select table(s) by hatching the check-box to the left of the table name; for example, select the following tables from the Northwind DB: Categories, Customers, Employees, Order_Details, Orders, Products .
Figure16.76.Generating Transient and/or Persistent Linked Data Views
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Click Generate via Wizard:
Figure16.77.Generating Transient and/or Persistent Linked Data Views
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Click Prepare to Execute.
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The R2RML script for the selected table(s) will be generated and displayed in the R2RML Graph text-area:
Figure16.78.Generating Transient and/or Persistent Linked Data Views
Figure16.79.Generating Transient and/or Persistent Linked Data Views
Figure16.80.Generating Transient and/or Persistent Linked Data Views
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As result the following R2RML script should be generated for the Northwind DB collection:
@prefix rr: <http://www.w3.org/ns/r2rml#> . @prefix Demo: <http://demo.openlinksw.com/schemas/Demo/> . @prefix demo-stat: <http://demo.openlinksw.com/Demo/stat#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix void: <http://rdfs.org/ns/void#> . @prefix scovo: <http://purl.org/NET/scovo#> . @prefix aowl: <http://bblfish.net/work/atom-owl/2006-06-06/> . <#TriplesMapCategories> a rr:TriplesMap; rr:logicalTable [ rr:tableSchema "Demo" ; rr:tableOwner "demo" ; rr:tableName "Categories" ]; rr:subjectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/categories/{CategoryID}"; rr:class Demo:Categories; ]; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:categoryid ] ; rr:objectMap [ rr:column "CategoryID" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:categoryname ] ; rr:objectMap [ rr:column "CategoryName" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:description ] ; rr:objectMap [ rr:column "Description" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:picture ] ; rr:objectMap [ rr:column "Picture" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:categories_of_products ] ; rr:objectMap [ rr:parentTriplesMap <#TriplesMapProducts>; rr:joinCondition [ rr:child "CategoryID" ; rr:parent "CategoryID" ] ; ]; ] . <#TriplesMapCustomers> a rr:TriplesMap; rr:logicalTable [ rr:tableSchema "Demo" ; rr:tableOwner "demo" ; rr:tableName "Customers" ]; rr:subjectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/customers/{CustomerID}"; rr:class Demo:Customers; ]; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:customerid ] ; rr:objectMap [ rr:column "CustomerID" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:companyname ] ; rr:objectMap [ rr:column "CompanyName" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:contactname ] ; rr:objectMap [ rr:column "ContactName" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:contacttitle ] ; rr:objectMap [ rr:column "ContactTitle" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:address ] ; rr:objectMap [ rr:column "Address" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:city ] ; rr:objectMap [ rr:column "City" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:region ] ; rr:objectMap [ rr:column "Region" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:postalcode ] ; rr:objectMap [ rr:column "PostalCode" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:country ] ; rr:objectMap [ rr:column "Country" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:countrycode ] ; rr:objectMap [ rr:column "CountryCode" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:phone ] ; rr:objectMap [ rr:column "Phone" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:fax ] ; rr:objectMap [ rr:column "Fax" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:customers_of_orders ] ; rr:objectMap [ rr:parentTriplesMap <#TriplesMapOrders>; rr:joinCondition [ rr:child "CustomerID" ; rr:parent "CustomerID" ] ; ]; ] . <#TriplesMapEmployees> a rr:TriplesMap; rr:logicalTable [ rr:tableSchema "Demo" ; rr:tableOwner "demo" ; rr:tableName "Employees" ]; rr:subjectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/employees/{EmployeeID}"; rr:class Demo:Employees; ]; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:employeeid ] ; rr:objectMap [ rr:column "EmployeeID" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:lastname ] ; rr:objectMap [ rr:column "LastName" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:firstname ] ; rr:objectMap [ rr:column "FirstName" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:title ] ; rr:objectMap [ rr:column "Title" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:titleofcourtesy ] ; rr:objectMap [ rr:column "TitleOfCourtesy" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:birthdate ] ; rr:objectMap [ rr:column "BirthDate" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:hiredate ] ; rr:objectMap [ rr:column "HireDate" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:address ] ; rr:objectMap [ rr:column "Address" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:city ] ; rr:objectMap [ rr:column "City" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:region ] ; rr:objectMap [ rr:column "Region" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:postalcode ] ; rr:objectMap [ rr:column "PostalCode" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:country ] ; rr:objectMap [ rr:column "Country" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:countrycode ] ; rr:objectMap [ rr:column "CountryCode" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:homephone ] ; rr:objectMap [ rr:column "HomePhone" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:extension ] ; rr:objectMap [ rr:column "Extension" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:photo ] ; rr:objectMap [ rr:column "Photo" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:notes ] ; rr:objectMap [ rr:column "Notes" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:reportsto ] ; rr:objectMap [ rr:column "ReportsTo" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:employees_of_orders ] ; rr:objectMap [ rr:parentTriplesMap <#TriplesMapOrders>; rr:joinCondition [ rr:child "EmployeeID" ; rr:parent "EmployeeID" ] ; ]; ] . <#TriplesMapOrder_Details> a rr:TriplesMap; rr:logicalTable [ rr:tableSchema "Demo" ; rr:tableOwner "demo" ; rr:tableName "Order_Details" ]; rr:subjectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/order_details/{OrderID}/{ProductID}"; rr:class Demo:Order_Details; ]; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:unitprice ] ; rr:objectMap [ rr:column "UnitPrice" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:quantity ] ; rr:objectMap [ rr:column "Quantity" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:discount ] ; rr:objectMap [ rr:column "Discount" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:order_details_has_orders ] ; rr:objectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/orders/{OrderID}" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:order_details_has_products ] ; rr:objectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/products/{ProductID}" ]; ] . <#TriplesMapOrders> a rr:TriplesMap; rr:logicalTable [ rr:tableSchema "Demo" ; rr:tableOwner "demo" ; rr:tableName "Orders" ]; rr:subjectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/orders/{OrderID}"; rr:class Demo:Orders; ]; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:orderid ] ; rr:objectMap [ rr:column "OrderID" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:orderdate ] ; rr:objectMap [ rr:column "OrderDate" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:requireddate ] ; rr:objectMap [ rr:column "RequiredDate" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:shippeddate ] ; rr:objectMap [ rr:column "ShippedDate" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:freight ] ; rr:objectMap [ rr:column "Freight" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:shipname ] ; rr:objectMap [ rr:column "ShipName" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:shipaddress ] ; rr:objectMap [ rr:column "ShipAddress" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:shipcity ] ; rr:objectMap [ rr:column "ShipCity" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:shipregion ] ; rr:objectMap [ rr:column "ShipRegion" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:shippostalcode ] ; rr:objectMap [ rr:column "ShipPostalCode" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:shipcountry ] ; rr:objectMap [ rr:column "ShipCountry" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:shipcountrycode ] ; rr:objectMap [ rr:column "ShipCountryCode" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:rowguid ] ; rr:objectMap [ rr:column "ROWGUID" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:orders_has_customers ] ; rr:objectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/customers/{CustomerID}" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:orders_has_employees ] ; rr:objectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/employees/{EmployeeID}" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:orders_has_shippers ] ; rr:objectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/shippers/{ShipVia}" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:orders_of_order_details ] ; rr:objectMap [ rr:parentTriplesMap <#TriplesMapOrder_Details>; rr:joinCondition [ rr:child "OrderID" ; rr:parent "OrderID" ] ; ]; ] . <#TriplesMapProducts> a rr:TriplesMap; rr:logicalTable [ rr:tableSchema "Demo" ; rr:tableOwner "demo" ; rr:tableName "Products" ]; rr:subjectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/products/{ProductID}"; rr:class Demo:Products; ]; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:productid ] ; rr:objectMap [ rr:column "ProductID" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:productname ] ; rr:objectMap [ rr:column "ProductName" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:quantityperunit ] ; rr:objectMap [ rr:column "QuantityPerUnit" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:unitprice ] ; rr:objectMap [ rr:column "UnitPrice" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:unitsinstock ] ; rr:objectMap [ rr:column "UnitsInStock" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:unitsonorder ] ; rr:objectMap [ rr:column "UnitsOnOrder" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:reorderlevel ] ; rr:objectMap [ rr:column "ReorderLevel" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:discontinued ] ; rr:objectMap [ rr:column "Discontinued" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:products_has_categories ] ; rr:objectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/categories/{CategoryID}" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:products_has_suppliers ] ; rr:objectMap [ rr:termtype "IRI" ; rr:template "http://demo.openlinksw.com/Demo/suppliers/{SupplierID}" ]; ] ; rr:predicateObjectMap [ rr:predicateMap [ rr:constant Demo:products_of_order_details ] ; rr:objectMap [ rr:parentTriplesMap <#TriplesMapOrder_Details>; rr:joinCondition [ rr:child "ProductID" ; rr:parent "ProductID" ] ; ]; ] .