diff --git a/structful.go b/structful.go
index 2179b3b..50fc3a8 100644
--- a/structful.go
+++ b/structful.go
@@ -3,9 +3,46 @@ package structful
 import (
 	"log"
 
-	"git.gsuntres.com/general/commons"
+	"github.com/ianlancetaylor/jsonschema"
+	"github.com/ianlancetaylor/jsonschema/draft7"
 )
 
+// import (
+// 	// "io"
+// 	// "encoding/json"
+// 	"log"
+// 	"fmt"
+// 	"errors"
+
+
+// )
+
+var validator *jsonschema.Schema
+
+func init() {
+	builder := draft7.NewBuilder()
+
+	builder.AddType("object")
+	
+	builder.AddProperties(map[string]*jsonschema.Schema{
+		"_group": draft7.NewSubBuilder().
+			AddType("string").
+			Build(), 
+		"_name": draft7.NewSubBuilder().
+			AddType("string").
+			Build(),
+		"_version": draft7.NewSubBuilder().
+			AddType("string").
+			Build(),
+	})
+
+	builder.AddRequired([]string{"_group", "_name", "_version"})
+
+	builder.AddAdditionalProperties(draft7.NewSubBuilder().BoolSchema(true))
+
+	validator = builder.Build()
+}
+
 var structful *Structful
 
 type IStructful interface {
@@ -65,7 +102,7 @@ type StructfulProps struct {
 }
 
 func(s *Structful) Save(data map[string]any) error {
-	if err := commons.Validate(data); err != nil {
+	if err := validator.Validate(data); err != nil {
 		return err
 	}