diff --git a/doc/topics/views/index.rst b/doc/topics/views/index.rst
index c1837c95b9..b62ad80108 100644
--- a/doc/topics/views/index.rst
+++ b/doc/topics/views/index.rst
@@ -191,6 +191,8 @@ Display a field of the object with the value of the current record.
 
     * ``name``: The name of the field.
 
+    * ``string``: The string that will be displayed for the widget.
+
     * ``widget``: The widget that must be used instead of the default one.
 
     * ``help``: The string that will be displayed when the cursor stays over the
diff --git a/trytond/ir/ui/form.rnc b/trytond/ir/ui/form.rnc
index d6375770b6..628a763e46 100644
--- a/trytond/ir/ui/form.rnc
+++ b/trytond/ir/ui/form.rnc
@@ -104,6 +104,7 @@ attlist.field &=
 attlist.field &= [a:defaultValue = "0"] attribute pre_validate { "0" | "1" }?
 attlist.field &= attribute icon { text }?
 attlist.field &= [a:defaultValue = "1"] attribute completion { "0" | "1" }?
+attlist.field &= attribute string { text }?
 image = element image { attlist.image, empty }
 attlist.image &= attribute name { text }
 attlist.image &= [ a:defaultValue = "1" ] attribute colspan { text }?
diff --git a/trytond/ir/ui/form.rng b/trytond/ir/ui/form.rng
index 6d2b947798..22f9375885 100644
--- a/trytond/ir/ui/form.rng
+++ b/trytond/ir/ui/form.rng
@@ -379,6 +379,11 @@
       </attribute>
     </optional>
   </define>
+  <define name="attlist.field" combine="interleave">
+    <optional>
+      <attribute name="string"/>
+    </optional>
+  </define>
   <define name="image">
     <element name="image">
       <ref name="attlist.image"/>