that's kind of a broad question. There are MANY different types and uses and all are described in full in the documentation under HOLD formats. Snipped from the doc:
FORMAT fmt
Specifies the format of the HOLD output file. BINARY is the default format for reporting servers.
To display as a Web page, choose: HTML, HTMTABLE
To display as a printed document, choose: PDF, PS
To use in a text document, choose: ALPHA, DOC, WP
In addition, Developer Studio supports: CLIP, RTF
To use in a spreadsheet application, choose: DIF, EXCEL, [PIVOT], EXL97, EXL2K, LOTUS, SYLK, TAB, TABT
To use in a database application, choose: COMMA, COM, COMT, FOCUS, DB2, FUSION, INGRES, REDBRICK, SQL, SQLDBC, SQLORA, SQLINF, SQLMSS, SQLSYB, SQLODBC, TABT
In addition, Developer Studio supports: SQLMAC
To use with a 3-GL program, choose: INTERNAL
To use for additional reporting, choose: ALPHA, BINARY, FOCUS
To use as a transaction file for modifying a data source, choose: ALPHA, BINARY
For details about all available formats, see Choosing Output File Formats.
Regards,
Darin
In FOCUS since 1991
WF Server: 7.7.04 on Linux and Z/OS, ReportCaster, Self-Service, MRE, Java, Flex
Data: DB2/UDB, Adabas, SQL Server Output: HTML,PDF,EXL2K/07, PS, AHTML, Flex
WF Client: 77 on Linux w/Tomcat