Naming Conventions in MISRA C 2012

[gpotts63]

What is the meaning of different naming conventions with rules?
For example, “Rule 2.1: A project shall not contains unreachable code” versus “Rule 5-0-7: There shall be no explicit floating-integral conversions of a cvalue expression”.
It seems some companies that use MISRA support only the decimal point rules, while others support the dashed rules.
What is the difference, and/or why is there a split?

[misra-c]

For example, “Rule 2.1: A project shall not contains unreachable code” versus “Rule 5-0-7: There shall be no explicit floating-integral conversions of a cvalue expression”.

The two different styles relate to the two main software coding guidelines:

• MISRA C uses the Rule 2.1 style format
  
• MISRA C++ uses the Rule 5-0-7 style format.