ldget

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.
• You want to write bash scripts that use linked data.
• You need to check triple values from inside your terminal.

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. Clone this repo and run go get ./... && go install to install the dependencies and the binaries.

Usage

• $ ldget triples ?s ?p ?o => fetches the subject (?s) URL, returns all triples that match
• $ ldget predicates ?s ?p ?o => fetches the subject (?s) URL, returns the predicates that match
• $ ldget objects ?s ?p ?o => fetches the subject (?s) URL, returns the objects that match
• $ ldget help => help file
• $ ldget prefixes => shows your configured prefixes

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

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 t 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 o joep schema:description

Install

• $ git clone git@github.com:ontola/ldget.git && cd ldget Clone repo, go to ldget folder
• $ go get ./... Install all dependencies
• $ go install Install binary to path

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.