ADスキーマの概念
https://technet.microsoft.com/ja-jp/subscriptions/2008.05.schema
一部属性の説明
http://otndnld.oracle.co.jp/document/products/id_mgmt/idm_904/doc_cd/connectors.904/E05499-01/app_attrmapp.htm
https://support.microsoft.com/ja-jp/kb/257218
https://support.microsoft.com/ja-jp/kb/283791
https://msdn.microsoft.com/en-us/library/ms679765%28v=vs.85%29.aspx
LDIFDEによるスキーマ拡張
https://technet.microsoft.com/ja-jp/library/Bb632388.aspx
https://support.microsoft.com/ja-jp/kb/313823
https://support.microsoft.com/ja-jp/kb/283791
＊ADの最大値
https://technet.microsoft.com/en-us/library/cc756101%28WS.10%29.aspx
