IO package: Difference between revisions

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'''This is the most important information you have to keep in mind when you have to work with "Excel" files.'''  
'''This is the most important information you have to keep in mind when you have to work with "Excel" files.'''  
* .xls - is the outdated default binary file format from <= Office 2003 - '''avoid this format!'''
* .xls - is an outdated default binary file format from <= Office 2003 - '''try to avoid this format!'''
* .xlsx - is the new default file format since Office 2007. [https://en.wikipedia.org/wiki/OOXML It consists of xml files which are stored in a .zip container.] - '''always save or convert in this format!'''
* .xlsx - is the new default file format since Office 2007. [https://en.wikipedia.org/wiki/OOXML It consists of xml files stored in a .zip container.] - '''always save in or convert to this format!'''
** The ''(new)'' OCT interface can read ''(since version 1.2.5)'' and write ''(since version 2.2.0)'' .xlsx files dependency-free! No need of MS Windows+Office nor Java.
** The ''(new)'' OCT interface can read ''(since version 1.2.5)'' and write ''(since version 2.2.0)'' .xlsx files dependency-free! No need of MS Windows+Office nor Java.
* blame your operating system for hiding the file extension!
* Windows is notorious for hiding "known" file extensions. However in Windows Explorer it is easy to change this and have Windows show all file extensions.


==== different interfaces ====
==== different interfaces ====
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