A filter can be compared to a single condition in an if-statement. Usually (almost always, see Group) the operators in the if-statement are "&&" (in JavaScript/C#)/"AND" (SQL).
A filter can be created by clicking on the Input tab in the Search Editor:
In the window, which pops up, there are three tabs: Meta data field, Table and column, and Draft - Predefined. If a filter is predefined, every aspect of the filter is hardcoded, ie the user has no way to change the filter during creation. As such, the predefined filter will not be mentioned below.
A filter MUST have some properties defined before it can be added to a search:
- The data, which the filter does work with