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Data FilesA data file has a name, attributes, date and time of last update, an allocated file size, and a current file size. If the file is open, it also has a current file pointer and a set of flags. The file pointer marks the offset within the file's data where the next read or write operation will start. The file pointer is advanced automatically. The file's flags define some options for the file, such as whether the file is open for read-only or read/write access, etc. Data files are used by application programs to store data. Under RTFiles-32, their size is limited to 240-1 (1T) bytes. However, such files cannot be read of written under DOS/Windows (though other files on a volume with large files can be accessed on other systems without problems.
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