Derive or implement this protocol to build JSON-LD structured data for your schema.

Implement build/2 which receives your item and conn and returns a map, list of maps, or nil.

The map(s) should contain a "@type" key, or you can use one of the helper modules like SEO.JSONLD.Article to build them. "@context" is added at render time by SEO.JSONLD.meta/1 on the top-level node(s).

Example

defimpl SEO.JSONLD.Build, for: MyApp.Article do
  def build(article, _conn) do
    SEO.JSONLD.Article.build(%{
      headline: article.title,
      description: article.description,
      date_published: article.published_at
    })
  end
end