diff --git a/db/versions/11419-orangeSalal/00-firstScript.sql b/db/versions/11419-orangeSalal/00-firstScript.sql
new file mode 100644
index 000000000..432ed70aa
--- /dev/null
+++ b/db/versions/11419-orangeSalal/00-firstScript.sql
@@ -0,0 +1,2 @@
+ALTER TABLE `vn`.`tag`
+ADD COLUMN IF NOT EXISTS `validationRegex` varchar(50) DEFAULT NULL;
diff --git a/loopback/locale/es.json b/loopback/locale/es.json
index abd2f79a0..f79dad236 100644
--- a/loopback/locale/es.json
+++ b/loopback/locale/es.json
@@ -397,4 +397,4 @@
 	"Incorrect delivery order alert on route": "Alerta de orden de entrega incorrecta en ruta: {{ route }} zona: {{ zone }}",
 	"Ticket has been delivered out of order": "El ticket {{ticket}} {{{fullUrl}}} no ha sigo entregado en su orden.",
 	"Price cannot be blank": "El precio no puede estar en blanco"
-}
\ No newline at end of file
+}
diff --git a/modules/item/back/models/item-tag.js b/modules/item/back/models/item-tag.js
index 5b7163913..2cd2e5f9b 100644
--- a/modules/item/back/models/item-tag.js
+++ b/modules/item/back/models/item-tag.js
@@ -10,4 +10,27 @@ module.exports = Self => {
             return new UserError(`Tag value cannot be blank`);
         return err;
     });
+
+    Self.observe('before save', async ctx => {
+        let tagFk;
+        let value;
+
+        if (ctx.isNewInstance) {
+            tagFk = ctx.instance.tagFk;
+            value = ctx.instance.value;
+        } else {
+            tagFk = ctx.currentInstance.tagFk;
+            value = ctx.data.value;
+        }
+        const models = Self.app.models;
+        const validTag = await models.Tag.findById(tagFk);
+
+        if (validTag.validationRegex) {
+            const regexString = validTag.validationRegex.replace(/\\\\/g, '\\');
+            const validExpresion = new RegExp(regexString);
+
+            if (value && !validExpresion.test(value))
+                throw new UserError('The value must be a number or a range of numbers');
+        }
+    });
 };
diff --git a/modules/item/back/models/tag.json b/modules/item/back/models/tag.json
index 6c5f5c0ba..5269b849f 100644
--- a/modules/item/back/models/tag.json
+++ b/modules/item/back/models/tag.json
@@ -30,6 +30,9 @@
         "mysql": {
           "columnName": "isQuantitatif"
         }
+      },
+      "validationRegex": {
+        "type": "string"
       }
     },
     "acls": [