it has the concept of roots (packages) allowing to configure the result with the same articles definition[1]
It can be useful for example if you want to publish several different documentations using the same source. For example if a part of your documentation deals with OpenSource elements which you want ot publish on the Web, but other deals with closed elements which you only want to publish internally
Comparison
Note that the following table do not imply that docJGenerator is better than X / Y / Z wiwki software, but rather to know if it can be useful to your use case, depending on the wiki software you already know.
has the concept of roots (packages) to define only one set of articles, but generates various resulting wikis depending on the generation configuration
has the concept of roots (packages) to define only one set of articles, but generates various resulting wikis depending on the generation configuration
has the concept of roots (packages) to define only one set of articles, but generates various resulting wikis depending on the generation configuration
Notes
^ It can be useful for example if you want to publish several different documentations using the same source. For example if a part of your documentation deals with OpenSource elements which you want ot publish on the Web, but other deals with closed elements which you only want to publish internally