This example functions as intended; however, when applying it in practice, it is crucial to verify whether a space immediately follows your union. Should other symbols be employed, they must be represented within the prefixOverrides.

In this instance, I inadvertently pressed Enter instead of space, causing the matching process to fail. Furthermore, special characters used within XML necessitate encoding transformations. The encoding for a line feed (LF) newline is 
 (different file formats or systems may utilize distinct newline characters).
Encoding for additional characters can be referenced at List of Unicode Characters.