== Phase P1: Relational Model

[[Image(RelationalModel-ProjectCode.svg,width=1000,height=800)]]

**Descriptive documentation and argumentation**

Model seagment Edition_Attributes - Each edition has its own set attributes example (num_pages,cover_type) but also have additional attributes represented by the table Attribute_Pair which contains a foreign keys to the table containing the additional attribute values and  a foreign key to the table containing the additional attribute types.