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No, ColdFusion is not proprietary. In fact, there are several other products (from other vendors) that have implemented CFML (or parts of it). In addition, ColdFusion leverages all open and public standards for everything from database integration (JDBC, ODBC) to configuration files (XML) to underlying architecture (J2EE). In fact, some might argue that ColdFusion and CFML are less proprietary than ASP and PHP (which are not supported by third party servers) and even Java itself (there is no licensing program or fee required to be ColdFusion compatible).
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