File used by WebSphere Application Server, a server program that hosts Web applications; contains an SQLtoXML Java class, database connection information, and an SQL query; used to generate XML data from SQL database queries. XST files are stored in an XML format. They can be created using WebSphere Studio Application Developer or any XML editor.
XST file suffix is associated with X-Tract XML. XMLScript is obsolete, and is no longer being developed or supported.
The XST file extension is associated with Microsoft Outlook, a personal information manager, which is part of Microsoft Office, developed by Microsoft Corporation. The .xst files are used for storing personal folders. Personal folders are useful for managing emails, and freeing up space in Microsoft Outlook or Microsoft Exchange server mailbox.