ODB Files

Michael Stahl mstahl at redhat.com
Wed Jul 11 07:54:49 PDT 2012

hi Graham,

On 09/07/12 16:53, Graham Weatherup wrote:

> The above link also directs to a description of how to unzip it in
> java** so I figured I should be able to zip the files up and open it
> again with Open Office. When I zip the files with java.util.zip using
> the method here***  the file called ‘mimetype’ comes out “compressed”
> but actually bigger and even setting compression off in the its still
> bigger but not as much 41bytes vs 43bytes (I don’t remember the numbers
> exactly) but not the 39bytes that is required. Also I read on a linux
> forum that I cannot find that mimetype has to be ‘at the beginning’ of
> the file.

there are very specific requirements on the "mimetype" file that are
likely difficult for generic zip libraries etc.; note that there is an
ODFDOM project that is a Java library that supports the ODF package
specification directly so it makes this kind of thing much easier (it
will also maintain the manifest automatically for you); it is now part
of the Apache ODF Toolkit project.


if you use a generic zip library then you should really read the ODF 1.2
part 3 specification to understand the special requirements.

> Also I wonder if there are any files that should be updated if tables
> get added etc. any other files in the ODB file?

i'm not familiar with the database part of ODF, but i could imagine it
contains meta-data like column descriptions and such; for details refer
to ODF 1.2 part 1 specification.


More information about the LibreOffice mailing list