To
Archive files such as ZIP, TAR, and RAR.
Mail messages such as Outlook (MSG) and Outlook Express (EML).
Mail stores such as Microsoft Outlook Personal Folders (PST), Mailbox (MBX), and Lotus Notes database (NSF).
PDF files that contain file attachments.
Compound documents with embedded OLE objects such as a Microsoft Word document with an embedded Excel chart.
The subfiles might also be container files, creating a file hierarchy of multiple levels. For example, an MSG file (the root parent) might contain three attachments:
a Microsoft Word document that contains an embedded Microsoft Excel spreadsheet.
an AutoCAD drawing file (DWG).
an EML file with an attached Zip file, which in turn contains four archived files.
The following diagram shows the file’s hierarchy.
Example Container File Tree Structure
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