In this example, a search is carried out in the extended search mask of the online catalogue of Trier UAS using the single field "Author": All documents whose author is "Albert Einstein" should be displayed.
The first two screenshots show the search entry and the hit list.
The last two screenshots are for comparison: They demonstrate a search across all fields. From the section of the hit list you can see that now also works are found which were not written by Albert Einstein (but about him).
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