The purpose of the Patient Care transaction set is to describe healthcare messages that need to be communicated among clinical applications.

The assertion is true because the Patient Care transaction set is specifically designed to facilitate communication of healthcare messages among various clinical applications. This encompasses a wide array of clinical data, such as patient records, treatment plans, clinical observations, and administrative data that is crucial for effective patient care.

Utilizing this transaction set enhances interoperability between different healthcare systems, allowing for streamlined communication and information sharing. As a result, healthcare providers can better coordinate care, which ultimately leads to improved patient outcomes. It serves as a standard framework to ensure that critical health information can be exchanged accurately and consistently across different platforms within the healthcare ecosystem.