I.R.I.S. Readiris 14 for Windows User Guide - Manual (Page 96)

Readiris TM 14 – User Guide
103
SpreadsheetML is an XML dialect developed by Microsoft Inc. It is
the standard spreadsheet format in Microsoft Excel 2003. This
format is useful when processing documents with lots of tables and
figures.
Specific layouting options are available for SpreadsheetML. See the
section SpreadsheetML Options for more information.

XLSX
XLSX is the new standard spreadsheet file format in Microsoft
Excel 2007 and 2010. XLSX files are created using the Open XML
standard. Each cell in an XLSX file can have a different formatting.
See the section Selecting the Formatting Options for more
information about the available layout options.

CSV
CSV stands for "Comma Separated Value". It is a text format for
storing tabular data. In a CSV file comma's are used to separate
values. This format is usually associated with Microsoft Excel on
Windows computers.

TXT
A TXT file is a standard text document that contains unformatted
text. TXT files can be opened in any text editing or word processing
application.
No Layout options are available for TXT files.

HTML
HTML stands for "Hypertext Markup Language". It is the
predominant markup language for web pages. It provides a means
to describe the structure and formatting of text-based information in
a document. This file format can be opened in Microsoft Excel, in