Add render reference asset manifest contract

examples/render/render-reference-manifest.yaml

@@ -0,0 +1,83 @@
+schema_version: markitect.render.reference.v1
+kind: render-reference-manifest
+manifest_id: render-manifest:example-report
+source_path: examples/render/report.md
+source_digest: sha256:example-report
+units:
+  - unit_id: section:results
+    kind: section
+    title: Results
+    source_path: examples/render/report.md
+    anchor: results
+    source_span:
+      source_path: examples/render/report.md
+      line_start: 8
+      line_end: 12
+    ordinal_hint: 1
+  - unit_id: figure:revenue
+    kind: figure
+    label: Figure
+    caption: Quarterly revenue
+    source_path: examples/render/report.md
+    anchor: fig:revenue
+    source_span:
+      source_path: examples/render/report.md
+      line_start: 14
+      line_end: 18
+      selector: "#fig-revenue"
+    content_hash: sha256:figure-revenue
+    ordinal_hint: 2
+    numbering:
+      scope: document
+      sequence: figures
+cross_references:
+  - reference_id: xref:revenue-from-results
+    source_unit_id: section:results
+    target_unit_id: figure:revenue
+    label: Figure
+    requested_style: numbered
+    fallback_text: Quarterly revenue
+toc:
+  - entry_id: toc:results
+    unit_id: section:results
+    title: Results
+    level: 1
+    order: 1
+asset_manifest:
+  schema_version: markitect.render.reference.v1
+  manifest_id: asset-manifest:example-report
+  source_path: examples/render/report.md
+  source_digest: sha256:example-report
+  assets:
+    - asset_id: asset:revenue-chart
+      source_uri: images/revenue-chart.png
+      source_path: examples/render/images/revenue-chart.png
+      name: revenue-chart.png
+      media_type: image/png
+      extension: .png
+      digest: sha256:revenue-chart
+      role: figure-image
+      copy_policy: copy
+      output_reference: renderer://asset/revenue-chart
+      provenance:
+        - source_uri: images/revenue-chart.png
+          source_path: examples/render/report.md
+          attachment_id: revenue-chart.png
+          source_adapter_id: markitect-filter
+          digest: sha256:revenue-chart
+source_maps:
+  - map_id: source-map:revenue-figure
+    source:
+      source_path: examples/render/report.md
+      line_start: 14
+      line_end: 18
+      selector: "#fig-revenue"
+    source_unit_id: figure:revenue
+    generated_by: markitect.render.reference-manifest
+    render_unit_id: figure:revenue
+    artifact_ref: renderer-source
+    role: figure
+metadata:
+  concrete_renderer_required: false
+  final_numbering_assigned_by_core: false
+  asset_copying_performed_by_core: false