jekyll-rdfa

This scans all the posts in a Jekyll site for RDFa-encoded data. It gathers all of these into one graph and outputs it as Turtle in posts.ttl and as JSON-LD in posts.json.

Installation

You can install and use this the way you do with Ruby gems/Jekyll plugins:

gem install jekyll-rdfa

Also see the Jekyll page on Plugins for more information on how to apply this to your site.

Configuration

By default, this outputs two files: _linked-data/posts.json and _linked-data/posts.ttl. You can now set this in the _config.yaml file for the site:

rdfa:
  outputs:
    - _rdfa-output/graph.ttl
    - _rdfa-output/graph.json
    - _rdfa-output/graph.rdf

The value for rdfa.outputs must be a list. And as this example shows, you can also now opt to output RDF/XML.

YAML Metadata

jekyll-rdfa also pays attention to a number of keys in the YAML post frontmatter.

vocab A default vocabulary URI for the page.

resource The URI for the topic of the page.

typeof The URI rdf:type of the topic of the page.

prefix A YAML hash mapping prefixes to URIs that you will use in the page.

For example, here are some fields from a YAML frontmatter:

vocab: http://bibframe.org/vocab/
resource: http://dbpedia.org/c/8CCRUT
typeof: Person
prefix:
  purdom: http://purdom.org/reading#
  err:    http://www.ericrochester.com/reading#