Set Meta Data
Synopsis
This operator allows you to add or overwrite meta data information. Note that meta data is NOT the real data! This is NOT changing the underlying data in your table!
Description
Every operator 'knows' what kind of data it got. It knows the attribute names, types, roles and sometimes also ranges. This information is very useful to pick attributes in every operator.
The system works like this, that every Read operator is generating a meta data object. Every succeeding operator can change the metadata. A Generate Attributes operator is adding the attributes specified and an Apply Model operator is adding the confidence and prediction attributes with their correct roles.
In rare cases this system does not work. You can still manually type attribute names, but this is sometimes unpleasant. Causes for failing meta data transformation are often unknown meta data of Read operators, because you do not know what you receive. Another problem are operators which change the schema in a way you can not know from just knowing the schema of the incoming data set. The Transpose and the Pivot operator are good examples for this challenge.
This operator gives you the option to manually add or overwrite meta data of Example Sets. You can specify name, type and role of attributes and add them to the meta data. Note that this will NOT change the underlying data, but just what you see in the user interface.
If an attribute name already exists, then the old attribute is removed from the meta data. If an attribute role already exists, then the user can specify how to handle this. Depending on how the remove_duplicate_roles parameter is set the old attribute is either deleted or set to regular.
Input
exa
The example set which meta data is to be changed.
Output
exa
The example set with changed meta data. The underlying real data is untouched.
Parameters
Attributes
This menu allows you to edit the list of attributes for which you want to change the meta data.
Attribute name
Name of the attribute you want to create.
Attribute type
Type of the attribute you want to create.
Attribute role
Role of the attribute you want to create.
Remove duplicate roles
If set to true attributes with the same role then the one you want to add are deleted. If set to false they are set to regular.