cannot install several java related packages because libfop-java is absent from the repositories

Hi, here's an example with one of the affected packages:

# apt install libdoxia-sitetools-java
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libdoxia-sitetools-java : Depends: libdoxia-java but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
# apt install libdoxia-java
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libdoxia-java : Depends: libfop-java but it is not installable
E: Unable to correct problems, you have held broken packages.
# apt install libfop-java
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package libfop-java is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libfop-java' has no installation candidate

Denis.