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Editorial Team
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Asked: 2026-06-17T23:19:23+00:00

I need to open files with .tda , .tda.tdz extension and convert the data

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I need to open files with .tda, .tda.tdz extension and convert the data to readable string.

This is not Palm, I’m sure. Already tried that.

I think they are IBM DB2 database temporary files.

In the same folder with these files I have a config file that says .tda files are Zip Compressed.

I’m .net c# developer, so I wanted to know if it is possible to do that in c#

Thanks.

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1 Answer

  1. Editorial Team

    These files are part of a dictionary. Oxford, Cambridge, Longman, and many other digital dictionaries use these files to store the dictionary data.

    My guess is that they belong to some proprietary format that the publisher (Pearson Education Limited) uses, probably not related to DB2 at all.

    For example, the “Longman Dictionary of Contemporary English 5” installation contains the 

    /ldoce5.data/fs.skn/files.skn/CONTENT.tda.tdz       <--
/ldoce5.data/fs.skn/files.skn/files.dat
/ldoce5.data/fs.skn/files.skn/TITLE.tda             <--
/ldoce5.data/fs.skn/files.skn/NAME.tda
/ldoce5.data/fs.skn/files.skn/TEXTTITLE.tda
/ldoce5.data/fs.skn/files.skn/CONTENT.tda

    Besides copyright violations, dumping the strings in these files would probably require heavy reverse engineering. Most of them are probably just indexes of other parts of the dictionary data, and it’s quite probably that the publisher took measures such as encryption against accessing the content as plain text.

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