The Descriptions that have been defined in the Data Model are listed, with a '+' button trailing the name of the Description. Click on the '+' button to open the Description as an input field. Click the green 'add' button to add additional input fields. Click the red 'del' button to remove empty input fields.

Click the grey 'more' button to specify whether this Description should contain any values or not.

• Any (default), the Description may be empty or not empty.
• Not Empty, the Description should contain a value.
• Empty, the Description should not contain a value.

Values

Use the following operators to specify the behaviour of the filter while filtering numerals, dates or the number of returned valid responses:

• = (default) exact match.
• < less than the entered value.
• > greater than the entered value.
• ≤ equal or less than the entered value.
• ≥ greater or less than the entered value.
• > a < b in between the entered value.
• ≥ a ≤ b equal or in between the entered value.

All Descriptions containing strings or texts can be filtered using the following equality operators:

• * (default) the Description should contain an occurrence of the entered string.
• a* the Description should start with the entered string.
• *a the Description should end with the entered string.
• = the Description should be an exact match of the entered string.
• (.*) the Description should match the entered regular expression.

By default the filter for strings or texts is case and diacritic insensitive. Check the additional ḓC operator to make the filter case and diacritic sensitive. Add wildcards [*] (zero or more characters) [*1] [*2] [*3] (one, two, or three characters) to include unknown positions in your query, e.g. Ja[*1]ob Grimm.

True/False

Select a value to filter on.

Object Type, Classification, Process, Location Reference

Relational Descriptions allow you to create filters based on relationships. Find the desired target by performing a Quick Search using the input field or click the grey 'filter' button to find the target using the Filter functionality.

Next to the red 'del' button and the green 'add' button, a green 'filter' button allows you to filter the referenced elements. Click the green 'filter' button to open an existing filter or a new (empty) filter. At the top of the Filter popup, the tab from which this new filter was added is supplemented with a new tab that contains information about the referencing Description and the target Type, Classification or Reversed Classification.

Text (tags & layout), Reversal

Descriptions that can contain references to multiple Object Types can be filtered in two ways. Use the first set of drop down menu and input field to filter on strings mentioned in the Description. Use the second set of drop down menu and input field to first select an Object Type and secondly select one or multiple Objects of the selected Type.