I tried putting the following LDIF file in Apache Directory Studio, but it complained that the record must end with an empty line. Do you know why?
dn: CN=serialNumber,CN=Schema,CN=Configuration,DC=myorg,DC=com
changetype: ntdsSchemaAdd
lDAPDisplayName: serialNumber
adminDisplayName: serialNumber
description: Token serial number
attributeSyntax: 2.5.5.12
oMSyntax: 64
isMemberOfPartialAttributeSet: FALSE
isSingleValued: TRUE
searchFlags: 0
objectClass: attributeSchema
attributeID: 1.2.840.113556.1.8000.2554.56278.0.46625.19000.45599.15687267.6686356.2.1
schemaIDGUID:: 3U7SiIq9SByhs/i1Z6fEsw==