You can make a UML diagram, with the data in the following table, for a Model Entity Relationship diagram. Entity Person Forecast Recipe Medical Pharmaceutical company Pharmacy Medication Contract Phone Specialty Relationship Patient - Doctor Patient - Doctor - Prescription Medical - Specialty Patient - Forecast pharmaceutical company - medicine Recipe - Medication Pharmacy - Medicine pharmaceutical company - pharmacy - supervisor - contract Key DNI Code Code Code Code Name Code Code Code Relationship Attribute Start date and End date Broadcast date amount price Attributes Name, Address, City, Phone, Name, type Text, date Name, telephone Name, address, phone Formula Start date, End date, text Name Order Cardinality Medical N to 1 patient NaN NaN Correct Primary Correct 1 patient - n forecast NaN NaN NaN NaN Cardinality 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Correspondence 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Description MER Explanation 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1