There would be no “bridges” between version 2011 and 4.0(2019) certifications.
But the credits earned by a candidate at 2011 courses and exams can be matched for v. 4.0 certifications.
For example, 17 credits are necessary for the “Managing Professional” level. Current Expert certified professionals can take the exam directly. If a candidate passed, for example, OSA module exam, 4 credits are valid for the 4.0 certifications.
The “Specialist” and “MP” certification levels are expected in 2nd half of 2019.
Foundation level is expected by the end of 2018 or early 2019.