The Service (it's NOT the same than the TYPO3 services) is the heart and the backbone of the whole extended table collection. It handles the complete data for a table, performs all actions on the code, im- and exports the XHTML and it handles the templates.
The service class is delivered with the extension th_exttableservice and because it's the main class of the whole collection, the Wizard extension has a dependency on it.
The three extensions are devided because I want to provide developers the possibility to use the table service class for their own projects independently from the wizard extension.