diff --git a/mappings/net/minecraft/datafixer/NbtOps.mapping b/mappings/net/minecraft/datafixer/NbtOps.mapping
deleted file mode 100644
index f49219723c..0000000000
--- a/mappings/net/minecraft/datafixer/NbtOps.mapping
+++ /dev/null
@@ -1,4 +0,0 @@
-CLASS net/minecraft/class_2509 net/minecraft/datafixer/NbtOps
-	COMMENT Used to represent a Minecraft NBT as a {@link com.mojang.datafixers.Dynamic} for DataFixerUpper.
-	FIELD field_11560 INSTANCE Lnet/minecraft/class_2509;
-	CLASS class_5320 MapBuilder
diff --git a/mappings/net/minecraft/nbt/NbtOps.mapping b/mappings/net/minecraft/nbt/NbtOps.mapping
new file mode 100644
index 0000000000..acaaf9b262
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+++ b/mappings/net/minecraft/nbt/NbtOps.mapping
@@ -0,0 +1,21 @@
+CLASS net/minecraft/class_2509 net/minecraft/nbt/NbtOps
+	COMMENT Used to handle Minecraft NBTs within {@link com.mojang.serialization.Dynamic
+	COMMENT dynamics} for DataFixerUpper, allowing generalized serialization logic
+	COMMENT shared across different type of data structures. Use {@link NbtOps#INSTANCE}
+	COMMENT for the ops singleton.
+	COMMENT
+	COMMENT <p>For instance, dimension data may be stored as JSON in data packs, but
+	COMMENT they will be transported in packets as NBT. DataFixerUpper allows
+	COMMENT generalizing the dimension serialization logic to prevent duplicate code,
+	COMMENT where the NBT ops allow the DataFixerUpper dimension serialization logic
+	COMMENT to interact with Minecraft NBTs.</p>
+	COMMENT
+	COMMENT @see NbtOps#INSTANCE
+	FIELD field_11560 INSTANCE Lnet/minecraft/class_2509;
+		COMMENT An singleton of the NBT dynamic ops.
+		COMMENT
+		COMMENT <p>This ops does not compress maps (replace field name to value pairs
+		COMMENT with an ordered list of values in serialization). In fact, since
+		COMMENT Minecraft NBT lists can only contain elements of the same type, this op
+		COMMENT cannot compress maps.</p>
+	CLASS class_5320 MapBuilder