Presisting attributes destroyed by SQLMetal

[Andrus]

I use sqlmetal to generate cs code.

sql metal generates property attributes in form

[Column()]
public string Floorlimit { ....

I need to specify that this property is discriminator. Since C# does not
support partial properties, I added manually to generated code

[Column(IsDiscri minator=true)]

After I re-run sqlmetal, all IsDiscriminator values are lost.

How to set IsDiscriminator property so that this value persist after cs
code is re-generated by sqlmetal ?

Andrus.