Which key is used to link to a specific value in a typelist?

The correct choice is based on the concept of typelists in Guidewire, where a specific type of data must be referenced or linked correctly. In Guidewire, a type key is a unique identifier used to link to a specific value within a typelist. This connection is essential for ensuring that data can be retrieved and used accurately throughout the system.

Typelists are used to manage and organize data values, allowing for consistent usage of similar types of data. Each entry in a typelist is mapped to its type key, enabling the application to programmatically iterate over and reference entries when needed. The type key, therefore, plays a crucial role in associating the data entries with their respective meanings and is integral for data integrity within the platform.

The other options do not suitably fit the context of how values in typelists are accessed or linked. A foreign key generally refers to relationships between tables in a database, an array key pertains to indexes in data structures other than typelists, and a select key is not a standard term in this context. Hence, the type key's specific function of linking to values in a typelist solidifies its position as the right answer.