Which of the following is NOT a source for data pages?

The correct answer highlights that a SOAP service is not typically considered a source for data pages in Pega. Data pages are designed to retrieve and store information in a consistent way within the Pega platform. They can source data from various providers, but they primarily operate with data from other Pega constructs and system integrations.

Connectors, data transforms, and report definitions can all be utilized to populate data pages. Connectors facilitate communication with external systems, allowing data to be fetched or sent seamlessly. Data transforms allow for the manipulation and mapping of data from one structure to another, making them useful in setting up data pages. Report definitions serve as a way to query and aggregate data from the Pega database, enabling the creation of data pages that reflect the state of records based on defined criteria.

SOAP services, while they are a means of integrating external applications and can be used to send or receive data, do not directly serve as sources for data pages in the way that the other options do. Data pages typically depend on the more native functionalities of Pega for their configurations and data retrieval processes.