Regesta Imperii - Online Quellen zur Reichsgeschichte

Systematic Thesaurus

Topics
         History of economics  [+]   102610x
             Verkehr und Infrastruktur  [+]   18085x
                 Escorts  [+]   279x
                 Flüsse  [+]   4419x
                 Mühlen  [+]   3435x
                        Synonym: Milling
                 Schifffahrt  [+]   1935x
                 Straßen  [+]   4135x
                 Wasserversorgung  [+]   1263x

Thesaurus Help:

The systematic thesaurus of the OPAC is a hierachical collection of all descriptors which are used to categorize entries of the database concerning topics, time and geography. You can browse the descriptors by using the systematic tree view or the alphabetic register or by doing a text search on all descriptors.

Descriptors with the folder symbol contain more detailed descriptors of subcategories, which can be displayed by clicking on the descriptor text. If the descriptor has no subcategories, it is marked with a page symbol, and there is no link.

The number next to the descriptor shows the counter of all database entries which are tagged with the descriptor. You can display all these entries by clicking on the number.

You can add a descriptor to the selection with the [+] symbol. If you do so, and then click on the number of another descriptor to show the related entries then only the intersection of both descriptors will be displayed. Selecting a descriptor with the [+] symbol also gives you the possibility to filter the results by using the query form.

NOTE: Not all entries of the Opac are tagged with thesaurus descriptors, so an additional search with the regular query form may deliver different results.