- os << (ir->implementationId) << " "
- //<< ir->referenceId << " "
- << (ir->implementationName) << " "
- << (ir->implementationVersion);
+ if (ir->implementationId)
+ os << (ir->implementationId) << " ";
+ //<< ir->referenceId << " "
+ if (ir->implementationName)
+ os<< (ir->implementationName) << " ";
+ if (ir->implementationVersion)
+ os << (ir->implementationVersion) << " ";