In Quaestor the Expression Editor is the main tool to create and edit relations, functions en constraints (all expressions).

Expression Editor

The editor is divided in two parts:

In the upper part you can write your expression, with assistance of a dropdown selection box to assist with selection of allowed and existing parameters, intrinsic functions and available knowledge base functions and ToolTip functionality to assist with the use of the syntax of functions. Moreover, corresponding brackets are shown in equal color.

The lower part of for attributes and data. It is called the data slot of the Expression Editor. 

Selection assistance                                             Syntax assistance

When the expression editor is used to create or modify Taxonomy expressions, the background color of the expression editor will change to the color specified in Tools>Options... Colors tab

Quaestor interface

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