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Advanced Search

You are looking for descriptions that meet the selection criteria in a search mask. You can build very complex queries by linking logically together any number of search masks.

The Search Mask

The search mask, above a command line, looks like this:


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Basic Search (with a Single Search Criterion)

For basic searches, please note the following:
In the listbox (‘full text’) select the data type to be searched. There are 42 data types to choose from, as well as the ‘full text’ option. Opening the listbox shows these data types (also possible on this page). The document  Durchsuchbare Datenfelder, sinnvolle Operatoren und Inhalte von Suchfeldern provides further information.
The listbox (‘contains’) provides the option of selecting one of eight operators. But not every operator can be combined with any data type, and the default setting ‘contains’ is often the most effective option.
Type the text you are searching for in the search field . For more detailed instructions, go to Search Basics!
The listbox Treffer pro Seite (‘hits per page’) enables you to determine the length of each individual page of results. For more detailed information, go to Search Basics!
Click once on the button (‘start search’) to begin your search.
A click on the button (‘new search’) clears the search mask.
Example 1: The following query

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will find all descriptions with the string ‘Bungart’ in the data type ‘Drucker’ (‘printers’). All results will be displayed on a single ‘page’.
Example 2: The following query

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will find all descriptions containing the data type 'Rotdruck' (‘red print’) . Each ‘page’ will list 100 hits.

Multiple Criteria Search

You can enhance your search by clicking on the boxes to the right of the search field:
Clicking on in a search mask copies that mask and applies a Boolean AND operation to the search results of both the masks.
Clicking on in a search mask copies that mask and applies a Boolean OR operation to the search results of both the masks.
Clicking on clears that mask.
Example 3: Begin your search by completing the input fields for the first criterion. Then click on , and change the input fields according to the second criterion:

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Complex Searches with Any Boolean Operators

So far not all command fields have been explained to you.
Each search mask can be marked by clicking in the checkbox at the start of the mask. The boxes , and at the start of the command line apply to this marking.
Combined with NOT — hidden in the listbox — the Boolean operators AND and OR form a complete Boolean algebra which can be used to formulate any number of complex searches. However, you are restricted to normal forms, because there are no brackets. These are represented by the fields just introduced. All clear? No? Then let’s solve the following problem together! Imagine you are looking for editions printed in 1490 in Paris or Venice which contain 40 lines.
There are four search criteria. Create yourself a new set of four search masks by clicking three times on the button in the first mask. Fill in the masks in accordance with your search criteria. Your screen should look like this:

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Now mark the two masks which refer to printing location, by clicking on the checkbox at the start of the line. It should now look like this:
Now click on the button in the bottom command line. This links the two search masks with Boolean OR. The indentation of the search masks show that they are treated as a single new mask by the other search masks — the same effect achieved by brackets around two terms in mathematics.

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Special Characters

For information on the input of special characters, go to  Special Characters.

List of Search Results

Results are given as lists of descriptions. For more information on the details listed, go to  Search Results.

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