[Therion] user-defined attributes to database export

I've a lot of user-defined attributes on the station with entrance flag, centreline and survey object. The values are visible as a further column in the html list-exports. The data should be also available in the sql database export. Is there a way to manage this? Centreline, survey and station custom attributes should be enough. But map, scrap, point, line and surface custom attributes is not needed in the sql file. Three normalized tables would be fine: C_ATTR_STATION C_ATTR_CENTRELINE C_ATTR_SURVEY Each with an ID field of the corresponding table object, attribute name and value. //dirk