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It was not really human readable, and InDesign 2.0 couldn’t read it at all. What’s Adobe doing to make our lives easier? IDMLĪdobe originally create INX (InDesign Exchange format) for back-saving, but it turned out to be less than ideal for its purposes. Adobe is not marketing CS5.5 as a “full version”, and that’s because it’s targeting a specific market area (digital publishing), but there were some serious work done in InDesign to enable some of the new features which required structural changes. Older versions can’t be expected to read a database format which did not exist when the application was released. Newer versions can read the older database format because the format existed when the newer version was created, and the older format is converted to the newer one when the file is opened. To solve this problem, each version of InDesign has its own database structure, so it can be properly optimized. InDesign suffers from the same issues as standard databases, and if InDesign was locked into a non-changeable database structure, it would make it very difficult to efficiently add some of the new features and make certain application optimizations impossible. Any major changes that might be made can be very difficult to implement and inefficient to boot. Once a database has a structure, it’s very hard to change things later on. (Interestingly enough a lot of “fluff” is saved in the file resulting from previous transactions which get cleared out by doing a “save-as”.)Īnyone who works with databases knows how important it is to get the database structure correct from the start.
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The fact that InDesign works this way allows for many of its advanced features such as unlimited undo and its almost flawless file recovery. Every action in InDesign is a database transaction and all these transactions are saved as a database file for InDesign to be able to read. The InDesign file format is in reality one of a database, and InDesign is a (very complex) transactional database application.
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InDesign CS5 will not be able to open InDesign CS5.5 files. This issue will be brought to the forefront once again with the release of InDesign CS5.5. Conspiracy theories are exciting and everything, but there’s really no conspiracies related to InDesign… I’ve heard all kinds of silly theories as to why this is so - including one that Adobe does this on purpose to “force” you to upgrade. This has been a source of a lot of grumbling over the years. InDesign can not open files saved by later versions of the application.