List Registered Namespaces #
Problem #
I do not know which namespaces are registered currently in the database. How can I investigate what are these namespaces that I can/have to use?
Solution #
The following code fragment lists all the namespaces currently registered:
package main
import (
"fmt"
"github.com/cayleygraph/quad/voc"
// Add some predefined vocabularies
_ "github.com/cayleygraph/quad/voc/schema"
_ "github.com/cayleygraph/quad/voc/xsd"
_ "github.com/cayleygraph/quad/voc/rdf"
_ "github.com/cayleygraph/quad/voc/rdfs"
)
func main() {
fmt.Println("Registered namespaces:");
for _, v := range voc.List() {
fmt.Printf(" %s => %s\n", v.Prefix, v.Full);
}
}
cd namespaces
go run list_namespaces.go`
The results:
Registered namespaces:
schema: => http://schema.org/
xsd: => http://www.w3.org/2001/XMLSchema#
rdf: => http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs: => http://www.w3.org/2000/01/rdf-schema#