What is the meaning of the columns?

You're now prompted to configure which column in the source data contains the preferred name of the entities, and which column holds an alias value.
You're now prompted to connect the columns in your source data with the attributes defined by the schemata in {{project.label}}. To import entities, you will at least need to assign one column to the Name attribute of the imported entity.
You're now prompted to connect the columns in your source data with the attributes defined by the schemata in {{project.label}}. To import relations, you will at least need to set the Name attributes for the source and target entities of the relations that you're importing.
Column name Source Relation Target Import as
{{header}}

This URL will be used as a source reference for all data, unless a column in the data has been given that contains a more specific source reference for each record.