To create a table, use "Create" button in Manage menu with the instruction of "DB Table" type. Then, enter into this theme marked by D and start up the table schema description. To enter a new attribute (column), use button "Add". The first attribute is key always. The type of each attribute is defined by means of "Type" button. 

Beside the "Number" or "Char", we can choose specifiers: "Required", "Querying", "Output". The "Required" specifier means that attribute value cannot be empty. "Querying" specifies that the corresponding attribute (a name and values) participates at formation of inquiry. Attribute of "Output" type is reflected by system at the answer (report).