--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/digitalobjects.install	Tue Jun 02 08:57:48 2015 +0200
@@ -0,0 +1,35 @@
+<?php
+/**
+ * @file
+ * Install, update, and uninstall functions for the field_example module.
+ */
+
+/**
+ * Implements hook_field_schema().
+ *
+ * Defines the database schema of the field, using the format used by the
+ * Schema API.
+ *
+ *
+ * All implementations of hook_field_schema() must be in the module's
+ * .install file.
+ *
+ * @see http://drupal.org/node/146939
+ * @see schemaapi
+ * @see hook_field_schema()
+ * @ingroup field_example
+ */
+
+function digitalobjects_field_schema($field) {
+
+  $columns = array(
+      'objid' => array('type' => 'varchar', 'length' => 20, 'not null' => FALSE), //contains id for digitalobjects or collections
+  );
+  $indexes = array(
+      'objid' => array('objid'),
+  );
+  return array(
+      'columns' => $columns,
+      'indexes' => $indexes,
+  );
+}
\ No newline at end of file