From 98512371059400d01fa0ba1655fcb18a09f45ca5 Mon Sep 17 00:00:00 2001
From: Stefan Hornburg <racke@linuxia.de>
Date: Sun, 16 Mar 2008 09:36:06 +0000
Subject: [PATCH] unique ordercheck documentation added

---
 refs/unique.ordercheck | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 refs/unique.ordercheck

diff --git a/refs/unique.ordercheck b/refs/unique.ordercheck
new file mode 100644
index 0000000..7a4bec7
--- /dev/null
+++ b/refs/unique.ordercheck
@@ -0,0 +1,21 @@
+__NAME__ purpose
+record doesn't exist in a database table
+__END__
+
+__NAME__ description
+This profile checks whether a matching record exists in a database table.
+It succeeds if there is <emphasis>no</emphasis> such record.
+__END__
+
+__NAME__ example: Ensure unique email address
+<programlisting>
+email=email_only Please enter a valid email address.
+&amp;and
+email=unique userdb:email An account with this email address already exists.
+</programlisting>
+__END__
+
+__NAME__ notes
+This check doesn't guarantee unique records, as there is a small window of
+time between performing this check and creating a new record.
+__END__