Which data type is designated for the transmission of basic geographic address data?

The data type specifically designated for the transmission of basic geographic address data is XAD, which stands for "Extended Address." This data type is designed to encapsulate a complete set of address elements, including street address, city, state, postal code, and country. The structure allows for flexibility and comprehensiveness necessary for accurately describing a geographic location.

In contrast, the other data types serve different purposes. AN refers to "Alphabetic Numeric," primarily used for simple alphanumeric strings that do not have a defined structure. PN denotes "Person Name," which is intended for names and does not encompass address details. Similarly, XCN, or "Extended Composite ID Number," is better suited for identification purposes, such as individual IDs, not for address information. Thus, XAD is the most appropriate choice when dealing with geographic address data.