From 30acdbc4221a1b534a2bfabdd041b377bc8aa793 Mon Sep 17 00:00:00 2001
From: Alf Eaton <hubgit@@users.noreply.github.com>
Date: Fri, 17 Apr 2015 00:20:06 +0100
Subject: [PATCH] Start date must be optional

 In order for the schema to support an empty `<free_to_read/>` element,
the `start_date` attribute must be optional.
---
 niso-ali-1.0.xsd | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/niso-ali-1.0.xsd b/niso-ali-1.0.xsd
index 079e234..0e8bb3c 100644
--- a/niso-ali-1.0.xsd
+++ b/niso-ali-1.0.xsd
@@ -4,7 +4,7 @@
   <xsd:element name="free_to_read">
     <xsd:complexType>
       <xsd:attribute name="end_date" use="optional" type="xsd:date"/>
-      <xsd:attribute name="start_date" use="required" type="xsd:date"/>
+      <xsd:attribute name="start_date" use="optional" type="xsd:date"/>
     </xsd:complexType>
   </xsd:element>
   <xsd:element name="license_ref">