primarykey

The primary key for this table

    <table>
        <primarykey>person_id</primarykey>

Sometimes there are multiple candidates. Choose the one that the child tables will refer to.

You can also send multiple keys, if the next table needs more parameters.

    <table>
        <primarykey>person_id,type</primarykey>

When selecting a table row, this value or values will be sent as a parameter to the next view. They will be matched against the foreign key in the child table.
Se foreignkey for more info.

Use lowercase when possible