diff --git a/app/models/metadata_document_date.rb b/app/models/metadata_document_date.rb
index 34cbe1c..324e4be 100644
--- a/app/models/metadata_document_date.rb
+++ b/app/models/metadata_document_date.rb
@@ -7,7 +7,8 @@ class MetadataDocumentDate < MetadataTemplate
     Date.today.to_time
   end
 
-  def value_from_document
+  # @return [Time]
+  def document_value
     return nil if post.new?
 
     document.date
@@ -45,10 +46,10 @@ class MetadataDocumentDate < MetadataTemplate
         begin
           Date.iso8601(self[:value]).to_time
         rescue Date::Error
-          value_from_document || default_value
+          document_value || default_value
         end
       else
-        self[:value] || value_from_document || default_value
+        self[:value] || document_value || default_value
       end
   end
 
diff --git a/app/models/metadata_lang.rb b/app/models/metadata_lang.rb
index 5f31ee9..ff6c08e 100644
--- a/app/models/metadata_lang.rb
+++ b/app/models/metadata_lang.rb
@@ -6,12 +6,13 @@ class MetadataLang < MetadataTemplate
     super || I18n.locale
   end
 
-  def value_from_document
+  # @return [Symbol]
+  def document_value
     document.collection.label.to_sym
   end
 
   def value
-    self[:value] ||= value_from_document || default_value
+    self[:value] ||= document_value || default_value
   end
 
   def values
diff --git a/app/models/metadata_markdown_content.rb b/app/models/metadata_markdown_content.rb
index d3cc6de..92a1ab2 100644
--- a/app/models/metadata_markdown_content.rb
+++ b/app/models/metadata_markdown_content.rb
@@ -9,14 +9,15 @@ class MetadataMarkdownContent < MetadataText
   end
 
   def value
-    self[:value] || value_from_document || default_value
+    self[:value] || document_value || default_value
   end
 
   def front_matter?
     false
   end
 
-  def value_from_document
+  # @return [String]
+  def document_value
     document.content
   end
 
diff --git a/app/models/metadata_path.rb b/app/models/metadata_path.rb
index 3c93cca..95fc7db 100644
--- a/app/models/metadata_path.rb
+++ b/app/models/metadata_path.rb
@@ -3,12 +3,16 @@
 # Este campo representa el archivo donde se almacenan los datos
 class MetadataPath < MetadataTemplate
   # :label en este caso es el idioma/colección
+  #
+  # @return [String]
   def default_value
     File.join(site.path, "_#{lang}", "#{date}-#{slug}#{ext}")
   end
 
-  # El valor no vuelve desde el documento
-  def value_from_document
+  # La ruta del archivo según Jekyll
+  #
+  # @return [String]
+  def document_value
     document.path
   end
 
diff --git a/app/models/metadata_template.rb b/app/models/metadata_template.rb
index 638bdb8..76c3e7b 100644
--- a/app/models/metadata_template.rb
+++ b/app/models/metadata_template.rb
@@ -49,11 +49,7 @@ MetadataTemplate = Struct.new(:site, :document, :name, :label, :type,
   def value_was
     return @value_was if instance_variable_defined? '@value_was'
 
-    @value_was = value_from_document
-  end
-
-  def value_from_document
-    @value_from_document ||= document.data[name.to_s]
+    @value_was = document_value
   end
 
   def changed?
@@ -85,7 +81,7 @@ MetadataTemplate = Struct.new(:site, :document, :name, :label, :type,
   # Valor actual o por defecto.  Al memoizarlo podemos modificarlo
   # usando otros métodos que el de asignación.
   def value
-    self[:value] ||= if (data = value_from_document).present?
+    self[:value] ||= if (data = document_value).present?
                        private? ? decrypt(data) : data
                      else
                        default_value