Add @context to implementation list YAML.

Because YAML-LD is a Thing!

Author: BigBlueHat

_includes/implementation-item.liquid

@@ -1,11 +1,11 @@
 <li typeof="schema:SoftwareSourceCode">
   <a property="schema:codeRepository" href="{{ implementation.repo }}">
     <span property="schema:name">{{ implementation.name }}</span>
-    <span class="badge{% unless implementation.state == 'WIP' %}{% if implementation.jsonldVersion == 1.1 %} badge-success{% else %} badge-info{% endif %}{% endunless %}">
+    <span class="badge{% unless implementation.state == 'InProgress' %}{% if implementation.jsonldVersion == 1.1 %} badge-success{% else %} badge-info{% endif %}{% endunless %}">
       {%- if implementation.jsonldVersion == 1.0 -%}
         1.0
       {%- else -%}
-        {{ implementation.jsonldVersion }}{% if implementation.state == 'WIP' %} (<abbr title="Work In Progress">WIP</abbr>){% endif %}
+        {{ implementation.jsonldVersion }}{% if implementation.state == 'InProgress' %} (<abbr title="Work In Progress">WIP</abbr>){% endif %}
       {%- endif -%}
     </span>
   </a>

index.yaml

@@ -1,3 +1,11 @@
+"@context":
+  implementations: "@graph"
+  applicationCategory: https://schema.org/applicationCategory
+  language: https://schema.org/programmingLanguage
+  jsonldVersion: https://json-ld.org/#jsonldVersion
+  name: https://schema.org/name
+  repo: https://schema.org/codeRepository
+  state: https://schema.org/creativeWorkStatus
 implementations:
   # JavaScript
   - repo: https://github.com/digitalbazaar/jsonld.js
@@ -88,7 +96,7 @@ implementations:
   - repo: https://github.com/timothee-haudebourg/json-ld
     name: json-ld
     jsonldVersion: 1.1
-    state: WIP
+    state: InProgress
     language: Rust
   - repo: https://crates.io/crates/sophia
     name: sophia
@@ -98,5 +106,5 @@ implementations:
   - repo: https://github.com/mattrglobal/jsonld-lint
     name: jsonld-lint
     jsonldVersion: 1.1
-    state: WIP
+    state: InProgress
     language: Typescript