First implementation (#1)

Reviewed-on: #1

schemas/id-entry.schema.json

@@ -0,0 +1,87 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://paperspec.scient.ing/schemas/id-entry.schema.json",
+  "title": "ID table entry",
+  "description": "One line of ids.jsonl; spec/04-identity.md.",
+  "type": "object",
+  "properties": {
+    "id": {
+      "$ref": "common.schema.json#/$defs/nodeRef"
+    },
+    "kind": {
+      "enum": [
+        "retired",
+        "alias"
+      ]
+    },
+    "successor": {
+      "anyOf": [
+        {
+          "$ref": "common.schema.json#/$defs/nodeId"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "node_kind": {
+      "$ref": "common.schema.json#/$defs/nodeKind"
+    },
+    "rev": {
+      "type": "integer",
+      "minimum": 1
+    }
+  },
+  "required": [
+    "id",
+    "kind",
+    "successor"
+  ],
+  "additionalProperties": false,
+  "allOf": [
+    {
+      "if": {
+        "properties": {
+          "kind": {
+            "const": "retired"
+          }
+        }
+      },
+      "then": {
+        "required": [
+          "node_kind",
+          "rev"
+        ],
+        "properties": {
+          "id": {
+            "$ref": "common.schema.json#/$defs/nodeId"
+          }
+        }
+      },
+      "else": {
+        "properties": {
+          "id": {
+            "$ref": "common.schema.json#/$defs/alias"
+          },
+          "successor": {
+            "$ref": "common.schema.json#/$defs/nodeId"
+          }
+        },
+        "not": {
+          "anyOf": [
+            {
+              "required": [
+                "rev"
+              ]
+            },
+            {
+              "required": [
+                "node_kind"
+              ]
+            }
+          ]
+        }
+      }
+    }
+  ]
+}