diff --git a/Taskfile.yml b/Taskfile.yml
index acc2368..31ba9b7 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -3,16 +3,22 @@
 version: "3"
 
 tasks:
-    schemas: fd -e yml -p ./schemas-yaml -x task schema SCHEMA='{}'
+    schemas:
+        sources: [ 'schemas-yaml/*' ]
+        generates: [ 'schemas-json/*' ]
+        cmds:
+            - fd -e yml -p ./schemas-yaml -x task schema SCHEMA='{}'
 
     schema:
         vars:
+            TRANSFORM:
+                sh: |
+                    echo {{.SCHEMA}} | \
+                        perl -lnE's/yml$/pl/; s/^/.\//; say if -f $_'
             DEST:
                 sh: echo {{.SCHEMA}} | perl -pe's/ya?ml/json/g'
-        sources: ["{{.SCHEMA}}"]
-        generates: ["{{.DEST}}"]
         cmds:
-            - transerialize {{.SCHEMA}} {{.DEST}}
+            - transerialize {{.SCHEMA}} {{.TRANSFORM}} {{.DEST}}
 
     validate:
         silent: true
@@ -23,7 +29,8 @@ tasks:
                     --errors=json \
                     --verbose \
                     -c ajv-keywords \
-                    -s schemas-yaml/character.yml \
+                    -r schemas-json/classes.json \
+                    -s schemas-json/character.json \
                     -d {{.CLI_ARGS}}
     test:
         deps: [ schemas ]
diff --git a/samples/verg.yml b/samples/verg.yml
index 97ed937..1000903 100644
--- a/samples/verg.yml
+++ b/samples/verg.yml
@@ -1,5 +1,8 @@
 name: Verg-La
 player: Yanick
+class:
+  generic: magician
+  subclass: cryomancer
 statistics:
     strength: 11
     dexterity: 13
diff --git a/schemas-json/character.json b/schemas-json/character.json
index f97c88f..f4d0d1a 100644
--- a/schemas-json/character.json
+++ b/schemas-json/character.json
@@ -9,6 +9,9 @@
    "$id" : "https://hyperboria.babyl.ca/character.json",
    "additionalProperties" : false,
    "properties" : {
+      "class" : {
+         "$ref" : "/classes.json"
+      },
       "name" : {
          "type" : "string"
       },
@@ -43,7 +46,8 @@
    "required" : [
       "name",
       "player",
-      "statistics"
+      "statistics",
+      "class"
    ],
    "title" : "Hyperboria character sheet",
    "type" : "object"
diff --git a/schemas-json/classes.json b/schemas-json/classes.json
new file mode 100644
index 0000000..b725a0a
--- /dev/null
+++ b/schemas-json/classes.json
@@ -0,0 +1,66 @@
+{
+   "$defs" : {
+      "fighter" : [
+         "barbarian",
+         "berserker",
+         "cataphract",
+         "hunstman",
+         "paladin",
+         "ranger",
+         "warlock"
+      ],
+      "magician" : [
+         "cryomancer",
+         "illusionist",
+         "necromancer",
+         "pyromancer",
+         "witch"
+      ]
+   },
+   "$id" : "https://hyperboria.babyl.ca/classes.json",
+   "oneOf" : [
+      {
+         "enum" : [
+            "fighter",
+            "magician"
+         ]
+      },
+      {
+         "properties" : {
+            "generic" : {
+               "const" : "fighter"
+            },
+            "subclass" : {
+               "enum" : [
+                  "barbarian",
+                  "berserker",
+                  "cataphract",
+                  "hunstman",
+                  "paladin",
+                  "ranger",
+                  "warlock"
+               ]
+            }
+         },
+         "type" : "object"
+      },
+      {
+         "properties" : {
+            "generic" : {
+               "const" : "magician"
+            },
+            "subclass" : {
+               "enum" : [
+                  "cryomancer",
+                  "illusionist",
+                  "necromancer",
+                  "pyromancer",
+                  "witch"
+               ]
+            }
+         },
+         "type" : "object"
+      }
+   ],
+   "title" : "Classes of characters for Hyperborea"
+}
diff --git a/schemas-yaml/character.yml b/schemas-yaml/character.yml
index 204c87d..e0b0957 100644
--- a/schemas-yaml/character.yml
+++ b/schemas-yaml/character.yml
@@ -6,10 +6,12 @@ required:
     - name
     - player
     - statistics
+    - class
 properties:
     name: &string
         type: string
     player: *string
+    class: { $ref: '/classes.json' }
     statistics:
       type: object
       allRequired: true
diff --git a/schemas-yaml/classes.pl b/schemas-yaml/classes.pl
new file mode 100644
index 0000000..2f1b3fe
--- /dev/null
+++ b/schemas-yaml/classes.pl
@@ -0,0 +1,17 @@
+sub {
+    my $schema = $_->{oneOf} = [];
+
+    push @$schema, { enum => [ keys $_->{'$defs'}->%* ] };
+
+    for my $generic ( keys $_->{'$defs'}->%* ) {
+        push @$schema, {
+            type => 'object',
+            properties => {
+                generic => { const => $generic },
+                subclass => { enum => $_->{'$defs'}{$generic} }
+            }
+        }
+    }
+
+    return $_;
+}
diff --git a/schemas-yaml/classes.yml b/schemas-yaml/classes.yml
new file mode 100644
index 0000000..6a4336d
--- /dev/null
+++ b/schemas-yaml/classes.yml
@@ -0,0 +1,12 @@
+$id: https://hyperboria.babyl.ca/classes.json
+title: Classes of characters for Hyperborea
+$defs:
+  fighter:
+    - barbarian
+    - berserker
+    - cataphract
+    - hunstman
+    - paladin
+    - ranger
+    - warlock
+  magician: [cryomancer, illusionist, necromancer, pyromancer, witch]