First implementation (#1)

Reviewed-on: #1

schemas/manifest.schema.json

@@ -0,0 +1,59 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://paperspec.scient.ing/schemas/manifest.schema.json",
+  "title": "Package manifest",
+  "description": "MANIFEST.json, scienting-package/1; spec/12-package.md.",
+  "type": "object",
+  "properties": {
+    "format": {
+      "const": "scienting-package/1"
+    },
+    "doc": {
+      "const": "scienting-doc/1"
+    },
+    "key": {
+      "$ref": "common.schema.json#/$defs/documentKey"
+    },
+    "files": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "properties": {
+          "path": {
+            "type": "string",
+            "minLength": 1,
+            "maxLength": 512
+          },
+          "sha256": {
+            "$ref": "common.schema.json#/$defs/hash"
+          },
+          "size": {
+            "type": "integer",
+            "minimum": 0
+          },
+          "present": {
+            "const": false
+          },
+          "media_type": {
+            "type": "string",
+            "minLength": 1
+          }
+        },
+        "required": [
+          "path",
+          "sha256",
+          "size"
+        ],
+        "additionalProperties": false
+      },
+      "minItems": 1
+    }
+  },
+  "required": [
+    "format",
+    "doc",
+    "key",
+    "files"
+  ],
+  "additionalProperties": false
+}