.. Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0
..
-.. Copyright (C) 2021 Bell Canada
+.. Copyright (C) 2021-2022 Bell Canada
=====================
CPS Temporal Modeling
=====================
-.. warning:: Draft
+Event Structure
+===============
+
+Data manipulated by both CPS Core and CPS Temporal to represent a Data Updated
+Event is a JSON structure that is defined by following Json Schema:
+
+* :download:`cps-data-updated-event-schema.json <../_static/event-schema/cps-data-updated-event-schema.json>`
+
+And following is an example of an event compliant with this schema:
+
+.. code:: json
+
+ {
+ "schema": "urn:cps:org.onap.cps:data-updated-event-schema:v2",
+ "id": "38aa6cc6-264d-4ede-b534-18f5c1f403ea",
+ "source": "urn:cps:org.onap.cps",
+ "type": "org.onap.cps.data-updated-event",
+ "content": {
+ "observedTimestamp": "2021-06-09T13:00:00.123-0400",
+ "operation": "UPDATE",
+ "dataspaceName": "my-dataspace",
+ "schemaSetName": "my-schema-set",
+ "anchorName": "my-anchor",
+ "data": {
+ "interface": {
+ "name": "itf-1",
+ "status": "up"
+ }
+ }
+ }
+ }
+
+Event versions
+==============
+
+The following table lists the data-updated-event schema evolution over releases :
+
+ +-----------+------------+-------------------------+---------------------+
+ | Version | Release | Compatibility Type | Upgrade First |
+ | | | (with previous version) | |
+ +===========+============+=========================+=====================+
+ | v1 | Istanbul | n/a | Any order |
+ +-----------+------------+-------------------------+---------------------+
+ | v2 | Jakarta | Backward | Consumer (Temporal) |
+ +-----------+------------+-------------------------+---------------------+
+
+**Compatibility Types**
+
+Several compatibility types exist when an event schema definition is evolving from one release to the next one:
+
+- Backward compatibility means that consumers using the new schema can read data produced with the previous schema.
+- Forward compatibility means that data produced with a new schema can be read by consumers using the previous schema.
+- Full compatibility means that schemas are both backward and forward compatible: old data can be read with the new schema, and new data can also be read with the previous schema.
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