Here's a quick example. Put this in a Rails template: <%= WebSite.new( name: 'Texas Public Law', url: 'https://texas.public.law', )%>

Here's a quick example. Put this in a Rails template: <%= WebSite.new( name: 'Texas Public Law', url: 'https://texas.public.law', )%> ...and you'll see this in the HTML: <script type="application/ld+json"> { "@context": "http://schema.org", "@type": "WebSite", "name": "Texas Public Law", "url": "https://texas.public.law" } </script> This DRY's up my code - I just encode the right way of forming JSON-LD and the correct objects and attributes in one place, the library. (That JSON-LD is from my live site, https://texas.public.law https://texas.public.law) Details: First I created a small library which wraps Rails ActiveModel Validations so they can be used in any Ruby object. And I supply a new validator, TypeValidator. https://github.com/public-law/validated_object https://github.com/public-law/validated_object With this building block, I can create classes for each Schema type I care about. And they strictly enforce their attributes: class Organization < SchemaType attr_accessor founding_date validates founding_date, type: Date end That's a little redundant, but to a Rails developer, it's immediately clear what's going on. The full Organization code: https://github.com/public-law/schema-dot-org/blob/master/lib/schema_dot_org/organization.rb https://github.com/public-law/schema-dot-org/blob/master/lib... I'm not using Ruby-RDF at all. I looked into the current Ruby meta-data and strong typing work, and found it all too complex for my simpler use case: I'm creating websites, and I want to embed correct JSON-LD-formatted schema.org in a rock-solid way: (1) Correct syntax, and (2) correct semantics. I've got the information as Rails models and objects, and I need to convert this to HTML/JSON-LD. So all of these objects, like Organization above, recursively creates proper markup in response to #to_s: <%= @an_organization %> ...instantiated from that class above, will result in this in the generated HTML page: <script type="application/ld+json"> { "@context": "http://schema.org", "@type": "Organization", etc. https://github.com/public-law/schema-dot-org#usage https://github.com/public-law/schema-dot-org#usage