Why is this an issue?

To simplify reviews and changes, a file should not define more than one entity.

How to fix it

Code examples

Noncompliant code example

my_entities.vhd

entity my_entity_1 is
end;

entity my_entity_2 is
end;

Compliant solution

my_entity_1.vhd

entity my_entity_1 is
end;

my_entity_2.vhd

entity my_entity_2 is
end;