The “Virtuelle Fachbibliotheken” (virtual scientific libraries) are a concept of the “Deutsche Forschungsgemeinschaft” (DFG, the central German Scientific Association). They are portals to the digital resources of several sciences . For many themes there are “ViFas” (overview, which are offering indices of links, electronic journals, databases and entrance for scinetific texts. Each “Virtuelle Fachbibliothek” has its own concept, so you must look each time how the resources are structured (Germany is a federal political system and so many things are aranged in different order, also the classifications …). Most of the ViFas are in German, but some are in English, for example the Middle East Virtual Library (MENALIB):
The Middle East Virtual Library (MENALIB) is an information portal for Middle East and Islamic Studies. It provides access to online information and to digital records of printed and other offline media and thus supports the concept of a hybrid library for Middle East and Islamic Studies.