Manual selection of attributes and composition of data domain.
Select Attributes widget is used to manually compose your data domain, that is, to decide which attributes will be used and how. Orange distinguishes between ordinary attributes, an (optional) class attributes and meta attributes. For instance, for building a classification model, the domain would be composed of a set of attributes and a discrete class attribute. Meta attributes are not used in modelling, but several widgets can use them for providing optional labels to instances.
Orange attributes are typed and are either discrete, continuous or a character string. The attribute type is marked with a symbol appearing before the name of the attribute (D, C, S, respectively).
Changes made to the domain are propagated to the output by pressing an Apply button. Reset will present the attributes as defined in original domain in the data set from the input signal
Below is a simple example how to use this widget. The input is fed directly from the File widget, and the output to the Data Table widget. We have also linked the former to the File widget so that one can inspect the difference in the domain composition.