ldget

A simple command line interface tool to get RDF items using HTTP GET requests.

When should you use this?

• You need RDF data as Stdout.
• Write bash scripts that use linked data.ldget
• Check triple values from inside your terminal.
• Testing your linked data service.
• Get data from your Solid pod.

Installation

• On MacOS using homebrew: $ brew tap ontola/ldget https://github.com/ontola/ldget.git && brew install ontola/ldget/ldget
• Or install the binaries from the releases page
• Or build it yourself. Install golang, clone this repo and run go get ./... && go install to install the dependencies and add ldget to path.

Usage

COMMANDS:
     triples, t            Fetch an RDF resource, return the triples. Serialized as N-Triples.
     predicates, p         Fetch an RDF resource, return the predicates.
     objects, o            Fetch an RDF resource, return the objects.
     subjects, s           Fetch an RDF resource, return the subjects.
     predicateObjects, po  Fetch an RDF resource, return the predicate and object values.
     prefixes              Shows your user defined prefixes from  `~/.ldget/prefixes`.
     expand, x             Expands any prefix. `ldget x schema` => https://schema.org/
     help, h               Shows a list of commands or help for one command

Use ?s ?p ?o to filter by %{subject URL} %{predicate URL} %{object value}. This is similar to Triple Pattern Fragments.

If you want to fetch a URL, but do not want to filter by it's subject, you can use the --resource flag:

ldget triples --resource http://example.com/myResourceURL Returns all triples for that resource as N-Triples.

Use the . character as a wildcard. For example, if you want to get all triples for subject http://example.com/X with an object value of "Value", use:

$ ldget triples http://example.com/X . "Value"

Prefixes

URLs are awesome, but they are cumbersome to remember and type. You can specify a set of prefixes in ~/.ldget/prefixes for mapping URLs to shorthands.

schema=http://schema.org/
joep=https://argu.co/argu/u/joep

$ ldget objects joep schema:description

Test

• $ go test

Credits

Written by Joep Meindertsma.

Most of the hard work is done by the guys at Knakk, who wrote this awesome RDF library for Go.