What changed between versions
Compare OCPI 2.1.1, 2.2.1, and 2.3.0 side by side
OCPI grew over time. Each release added modules and tightened a few rules. This is what a partner has to change when they move from one version to the next, derived straight from the version registry the tester enforces.
Compare one concept
Pick a concept to read how OCPI 2.1.1, 2.2.1 and 2.3.0 each answer it, beside the clause each answer rests on.
Must a Sessions PATCH request carry last_updated?
OCPI 2.1.1
A PATCH carries only the fields that changed. The 2.1.1 PATCH subsection adds no last_updated requirement.
Source
OCPI 2.2.1 and 2.3.0
Every Sessions PATCH request SHALL contain last_updated.
Source
OCPI 2.2 source, for comparison
Every Sessions PATCH request SHALL contain last_updated.
Source
Modules in each version
Core means a chapter of that version's specification. Extension means a document published separately for that version. The first version that lists a module is the one that introduced it.
| Module | OCPI 2.1.1 | OCPI 2.2.1 | OCPI 2.3.0 |
|---|---|---|---|
| Sessions | Core | Core | Core |
| CDRs | Core | Core | Core |
| Locations | Core | Core | Core |
| Tariffs | Core | Core | Core |
| Tokens | Core | Core | Core |
| Commands | Core | Core | Core |
| Credentials | Core | Core | Core |
| Versions | Core | Core | Core |
| Hub Client Info | Not included | Core | Core |
| Charging Profiles | Not included | Core | Core |
| Payments | Not included | Extension | Core |
| Bookings | Not included | Not included | Extension |
Compare two versions
Pick a starting version and a target to see the new modules and rule changes between them.
Compare explanations and their sources
Use the version selector to read OCPI 2.1.1, 2.2.1 or 2.3.0. The page identifies its version and keeps the relevant Sources close to the explanation.
The comparisons retain OCPI 2.2 where it is needed to explain a change. Shared explanations keep one canonical page, while a version-specific difference has its own address and references for both sides.
A protocol version selects content, not a language. Follow the ordinary version links to compare explanations without treating a version number as a translation code.
Where to go next
Common questions
Which versions can I select?
The lesson selector offers OCPI 2.1.1, 2.2.1 and 2.3.0. OCPI 2.2 is retained in source comparisons where a difference needs it; it is not a selectable run version.
How should I read a version comparison?
Read the version line, then open Sources for both sides of the comparison. A shared explanation keeps one canonical page; a version-specific difference has its own address and clause references.