# GVK

[GVK](https://gso.gbv.de), the GBV Union Catalogue, is a multimaterial bibliographic database of seven German federal states. It covers 41.5 million records of books, conference proceedings, periodicals, dissertations, microfilms and electronic resources.

To fetch entries from GVK, choose **Search → Web search**, and the search interface will appear in the side pane. Select **GVK (Gemeinsamer Verbundkatalog)** in the dropdown menu. To start a search, enter the words of your query, and press Enter or the **Fetch** button.

The results are displayed in the [import inspection window](https://docs.jabref.org/v4/import-export). In case an error occurs, it is shown in a popup.

## Advanced search

You can simply enter words / names / years you want to search for, or you can specify search keys. Supported keys are:

* all - all words. Not specifYing a search key results in an "all" search
* tit - title words
* per - authors, editors, etc.
* thm - topics
* slw - key words
* txt - tables of content
* num - numbers, e.g. ISBN
* kon - names of conferences
* ppn - Pica Production Numbers of the GVK
* bkl - Basisklassifikation-numbers
* erj - year of publication

### Notes

* queries can be combined with "and". The use of "and" is optional, though.
* in many cases you can use the truncation sign "?"
* spaces in person names are not supported yet. Please use the truncation sign ? after the first name for several given names. E.g. "per Maas,jan?"

### Sample queries

* "marx kapital"
* "per grodke and tit db2"
* "per Maas,jan?"