---
name: "rdfns"
section: "1p"
platform: "linux"
package: "librdf-ns-perl"
version: "20230619-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/rdfns"
---

# rdfns(1p)

## SYNOPSIS

```
    # look up namespaces in several formats
    $ rdfns foaf.xmlns foaf.n3 dbpedia.sparql foaf.json
    # look up a prefixed URI
    $ rdfns rdfs:seeAlso
    # look up multiple URIs at a given version
    $ rdfns 20111102 foaf,owl.ttl
    # lookup preferred prefix
    $ rdfns http://www.w3.org/2003/01/geo/wgs84_pos#

    # create short name of an URL
    $ rdfns http://purl.org/dc/elements/1.1/title
    # map prefix to preferred prefix
    $ rdfns wgs.prefix
    # show all options and some examples
    $ rdfns --help
    # show version
    $ rdfns --version
    # list available dates
    $ rdfns --dates
```

## FORMATS

- ttl, n3, notation3

  RDF/Turtle or Notation3 syntax:

  ```
      @prefix foaf: <http://xmlns.com/foaf/0.1/> .
  ```

- sparql

  SPARQL syntax:

  ```
      PREFIX foaf: <http://xmlns.com/foaf/0.1/>
  ```

- txt

  Tabulator-separated:

  ```
      foaf http://xmlns.com/foaf/0.1/
  ```

- xmlns

  XML namespace declaration

  ```
      xmlns:foaf="http://xmlns.com/foaf/0.1/"
  ```

- json

  JSON key-values, for instance for JSON-LD. Multiple entries are comma-separated.

  ```
      "foaf": "http://xmlns.com/foaf/0.1/"
  ```

- beacon

  BEACON format syntax:

  ```
      #PREFIX: http://xmlns.com/foaf/0.1/
  ```

- prefix

  Maps a prefix to its preferred form, this is the shortest and first in alphabetical order. For instance `"rdfns wgs84.prefix"` returns prefix `"geo"`.

## SEE ALSO

This script is internally implemented in App::rdfns, based on RDF::NS.