diff --git a/spec/data/json-vs-yaml.yaml b/spec/data/json-vs-yaml.yaml
new file mode 100644
index 0000000..971a2c9
--- /dev/null
+++ b/spec/data/json-vs-yaml.yaml
@@ -0,0 +1,18 @@
+$id: JSONOrYAMLFeature
+$reverse:
+  $type:
+    - rdfs:label: UTF-8
+      $type: Encoding
+      json:
+        - prov:value: yes
+          prov:wasDerivedFrom: JSON#section-8.1
+      yaml:
+        - prov:value: yes
+          prov:wasDerivedFrom: YAML#52-character-encodings
+    - rdfs:label: UTF-16
+      json:
+        - prov:value: no
+          prov:wasDerivedFrom: JSON#section-8.1
+      yaml:
+        - prov:value: yes
+          prov:wasDerivedFrom: YAML#52-character-encodings
diff --git a/spec/data/spec.yaml b/spec/data/spec.yaml
new file mode 100644
index 0000000..06abb44
--- /dev/null
+++ b/spec/data/spec.yaml
@@ -0,0 +1,78 @@
+"@context":
+  "@base": https://json-ld.github.io/yaml-ld/spec/
+  rdfs: http://www.w3.org/2000/01/rdf-schema#
+  schema: https://schema.org/
+
+  $id: "@id"
+  $type: "@type"
+
+$id: https://json-ld.github.io/yaml-ld/spec/
+schema:author:
+  - name: Gregg Kellogg
+    $id: https://github.com/gkellogg
+    $type: schema:Person
+
+  - name: Pierre-Antoine Champin
+    $id: https://github.com/pchampin
+    $type: schema:Person
+
+  - name: Roberto Polli
+    $id: https://github.com/ioggstream
+    $type: schema:Person
+
+  - name: Benjamin …
+    $id: https://github.com/BigBlueHat
+    $type: schema:Person
+
+  - name: Ted Thibodeau Jr
+    $id: https://github.com/TallTed
+    $type: schema:Person
+
+  - name: Vladimir Alexiev
+    $id: https://github.com/VladimirAlexiev
+    $type: Person
+
+  - name: Anatoly Scherbakov
+    country: am
+    $id: https://github.com/anatoly-scherbakov
+    $type: schema:Person
+
+license: …
+
+schema:hasPart:
+  - rdfs:label: Introduction
+    schema:hasPart:
+      - rdfs:label: How to read this document
+      - rdfs:label: Terminology
+      - rdfs:label: Namespace prefixes
+  - rdfs:label: Conformance
+  - rdfs:label: Basic concepts
+    schema:hasPart:
+      - rdfs:label: JSON vs YAML comparison
+  - rdfs:label: Core requirements
+    $type: NormativeSection
+    schema:hasPart:
+      - rdfs:label: Encoding
+      - rdfs:label: Comments
+      - rdfs:label: Anchors and aliases
+      - rdfs:label: Streams
+
+  - rdfs:label: Security Considerations
+  - rdfs:label: Interoperability Considerations
+
+  - rdfs:label: IANA Considerations
+    $type: NormativeSection
+    schema:hasPart:
+      - rdfs:label: application/ld+yaml
+      - rdfs:label: Fragment identifiers
+      - rdfs:label: Examples
+
+  - rdfs:label: FAQ
+    schema:hasPart:
+      - rdfs:label: Why does YAML-LD not preserve comments?
+      - rdfs:label: Why does YAML-LD not extend the JSON-LD data model?
+
+  - rdfs:label: Best Practices
+
+  - rdfs:label: Extended YAML-LD Profile
+  - rdfs:label: References