The following links direct to the German version of the Systematic Search:
Section "European Criminal Law" (Europarecht)
Section "Information Law and Legal Informatics" (Informationsrecht)
Section "Criminology" (Kriminologie)
Section "Law and Medicine" (Recht und Medizin)
Section "International Criminal Law" (Völkerrecht)
Country sections and supra-regional sections, Criminal Law (Strafrecht)
The library classification system can be navigated using the links listed above (the hyperlinked headings in the outline of each section will direct you to the corresponding search results in the Online Catalogue).
The overall structure of the classification system (BibInfo 05) as well as the alphabetical subject index (BibInfo 05a) can be downloaded as pdf files (see below). The list of national codes used for the sections "Information Law and Legal Informatics" (Informationsrecht), "Criminology" (Kriminologie) and "Law and Medicine" (Recht und Medizin) can be found in the annex to the library classification system (p. 67) or as a separate pdf file ("National Codes").