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In the context of files, an edition is a set of particular versions of files. A file version is here defined as the file at a particular time (for example, the version from January 17, 2006, 7:32 a.m.). Coming back to our example: document A is the first version of the document, which groups the file versions sent to the editor after the document had been created. Document A' groups the file versions sent to the editor after the document had been modified. To sum up, the first edition of the publication (created automatically when the publication was being created) groups the file versions of document A, and the second edition – of document A'. It should be added that if the document had many files and the author’s modifications did not apply to all those files, the second edition would group a part of the files from document A (the unmodified files) and a part of the files from document A' (the modified files).
We could illustrate explain the versionizing mechanism in greater detail with the example illustrated below. Let us assume that a given publication only has one file at the beginning, body.html. An editor creates a publication in the dLibra system and indicates that file as its content. The dLibra system creates the first edition of the publication. The edition groups the available file version. After a time, the author modifies the body.html file and adds the title.jpg file to the document. The editor creates a second edition, which groups the title.jpg file and the modified version of the body.html file. Some time later, the author modifies the document again, changing the body.html and title.jpg files and adding a new file, logo.gif. The editor creates a third edition, which groups the new logo.gif file and the newest versions of the body.html and title.jpg files. In the end, the publication consists of three editions. Each of them groups a set of particular versions of the files. The publication contains three files. Each file groups its own versions (for example, the title.jpg file groups version 1.1 and 1.3, and the logo.gif file only groups the 1.1 version).
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