Index: lams_build/conf/unix/lams/lams.dtd
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diff -u -r577577fa310b00293b2c06a53adde376062e5839 -r9437b396ea753716b90221a4cef08ff948bfe5c8
--- lams_build/conf/unix/lams/lams.dtd	(.../lams.dtd)	(revision 577577fa310b00293b2c06a53adde376062e5839)
+++ lams_build/conf/unix/lams/lams.dtd	(.../lams.dtd)	(revision 9437b396ea753716b90221a4cef08ff948bfe5c8)
@@ -1,4 +1,4 @@
-<!ELEMENT Lams (ServerURL,LamsHome,TempDir,DumpDir,SMTPServer,LamsSupportEmail,ContentRepositoryPath,UploadFileMaxSize,UploadLargeFileMaxSize,UploadFileMaxMemorySize,ChatServerName,ChatPortNumber,FileManagerDir,ExecutableExtensions,TicketFile,UserInactiveTimeout,AllowMultipleLogin,UseCacheDebugListener,AuthoringClientVersion,MonitorClientVersion,LearnerClientVersion,ServerVersionNumber,ServerLanguage, DictionaryDates)>
+<!ELEMENT Lams (ServerURL,LamsHome,TempDir,DumpDir,SMTPServer,LamsSupportEmail,ContentRepositoryPath,UploadFileMaxSize,UploadLargeFileMaxSize,UploadFileMaxMemorySize,ChatServerName,ChatPortNumber,FileManagerDir,ExecutableExtensions,TicketFile,UserInactiveTimeout,AllowMultipleLogin,UseCacheDebugListener,CleanupPreviewOlderThanDays,AuthoringClientVersion,MonitorClientVersion,LearnerClientVersion,ServerVersionNumber,ServerLanguage, DictionaryDates)>
 <!ELEMENT ServerURL (#PCDATA)>
 <!ELEMENT LamsHome (#PCDATA)>
 <!ELEMENT TempDir (#PCDATA)>
@@ -17,6 +17,7 @@
 <!ELEMENT UserInactiveTimeout (#PCDATA)>
 <!ELEMENT AllowMultipleLogin (#PCDATA)>
 <!ELEMENT UseCacheDebugListener (#PCDATA)>
+<!ELEMENT CleanupPreviewOlderThanDays (#PCDATA)>
 <!ELEMENT AuthoringClientVersion (#PCDATA)>
 <!ELEMENT MonitorClientVersion (#PCDATA)>
 <!ELEMENT LearnerClientVersion (#PCDATA)>
@@ -26,3 +27,14 @@
 <!ELEMENT Dictionary (language, createDate)>
 <!ELEMENT language (#PCDATA)>
 <!ELEMENT createDate (#PCDATA)>
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