Compatibility among CPE versions

VERSIONS 1.1 2.2 2.3 WFN 2.3 URI 2.3 FS
1.1 Yes Depends of count of parts Depends of count of parts Depends of count of parts Depends of count of parts
2.2 Depends of characters Yes Yes Yes Yes
2.3 WFN Depends of characters Depends of characters Yes Yes Yes
2.3 URI Depends of characters Depends of characters Yes Yes Yes
2.3 FS Depends of characters Depends of characters Yes Yes Yes