The current version of the OMG SysML specification is OMG SysML v. 1.6, which is available from the
SysML Specifications page of this web or can be downloaded from the
OMG web.
You can find a OMG SysML v. 1.6 minor revision change summary as part of the Answer to the
SysML FAQ: What is new in OMG SysML 1.6?.