Index: docs/model-api.txt
===================================================================
--- docs/model-api.txt	(revisión: 4347)
+++ docs/model-api.txt	(copia de trabajo)
@@ -126,6 +126,19 @@
 automatically be added to your model if you don't specify otherwise. See
 `Automatic primary key fields`_.
 
+``BinaryField``
+~~~~~~~~~~~~~
+
+Raw binary data,
+
+The admin represents this as an ``<input type="text">`` (a single-line input).
+
+``BinaryField`` has an extra required argument, ``maxlength``, the maximum length
+(in characters) of the field. The maxlength is enforced at the database level
+and in Django's validation.
+
+Note: Right now, database level enforcement only takes place in MySQL.
+
 ``BooleanField``
 ~~~~~~~~~~~~~~~~