Add translation namesspace and i18n:translate to the dexterity schema

definitions for the content types that have extra field defined on top of the
behavior composition. Otherwise no translations can be picked up.

CHANGES.rst

@@ -18,6 +18,11 @@ New features:
 
 Bug fixes:
 
+- Add translation namesspace and i18n:translate to the dexterity schema
+  definitions for the content types that have extra field defined on top of the
+  behavior composition. Otherwise no translations can be picked up.
+  [fredvd]
+
 - Use original raw text and mimetype when indexing rich text.
   This avoids a double transform (raw source to output mimetype to plain text).
   Includes a reindex of the SearchableText index for Collections, Documents and News Items.

plone/app/contenttypes/schema/file.xml

@@ -6,12 +6,12 @@
     <field name="title" type="zope.schema.TextLine">
       <description />
       <required>False</required>
-      <title>Title</title>
+      <title i18n:translate="">Title</title>
     </field>
     <field name="description" type="zope.schema.Text">
       <description />
       <required>False</required>
-      <title>Description</title>
+      <title i18n:translate="">Description</title>
     </field>
     <field name="file" type="plone.namedfile.field.NamedBlobFile"
         marshal:primary="true">

plone/app/contenttypes/schema/image.xml

@@ -6,12 +6,12 @@
     <field name="title" type="zope.schema.TextLine">
       <description />
       <required>False</required>
-      <title>Title</title>
+      <title i18n:translate="">Title</title>
     </field>
     <field name="description" type="zope.schema.Text">
       <description />
       <required>False</required>
-      <title>Description</title>
+      <title i18n:translate="">Description</title>
     </field>
     <field name="image" type="plone.namedfile.field.NamedBlobImage"
         marshal:primary="true">

plone/app/contenttypes/schema/link.xml

@@ -1,11 +1,14 @@
 <model xmlns="http://namespaces.plone.org/supermodel/schema"
-       xmlns:form="http://namespaces.plone.org/supermodel/form">
+       xmlns:form="http://namespaces.plone.org/supermodel/form"
+       xmlns:marshal="http://namespaces.plone.org/supermodel/marshal"
+       xmlns:i18n="http://xml.zope.org/namespaces/i18n"
+       i18n:domain="plone">
     <schema>
       <field name="remoteUrl" type="zope.schema.TextLine" form:widget="plone.app.z3cform.widget.LinkFieldWidget">
         <default>http://</default>
-        <description>The link is used almost verbatim, relative links become absolute and the strings "${navigation_root_url}" and "${portal_url}" get replaced with the real navigation_root_url or portal_url. If in doubt which one to use, please use navigation_root_url.
+        <description i18n:translate="description_linktype_url">The link is used almost verbatim, relative links become absolute and the strings "${navigation_root_url}" and "${portal_url}" get replaced with the real navigation_root_url or portal_url. If in doubt which one to use, please use navigation_root_url.
         </description>
-        <title>URL</title>
+        <title i18n:translate="">URL</title>
       </field>
     </schema>
 </model>