X-Git-Url: https://gerrit.onap.org/r/gitweb?a=blobdiff_plain;f=docs%2Farchitecture.rst;h=acde1b1cae4975296be952257d0eae21aac09cf1;hb=b869181fae9a688fa517ecb43a30b8331b82ccdc;hp=c613e4ff95fa10edde2d6b46814ae0beff170e99;hpb=541952b8b233fbac02d258d4869494cef75c0ba1;p=cps.git

diff --git a/docs/architecture.rst b/docs/architecture.rst
index c613e4ff9..acde1b1ca 100644
--- a/docs/architecture.rst
+++ b/docs/architecture.rst
@@ -1,5 +1,84 @@
-..  Copyright (C) 2021 Nordix Foundation
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. Copyright (C) 2021 Nordix Foundation, Pantheon.tech
 .. _architecture:
 
-CPS in ONAP Architecture
---------------------------
\ No newline at end of file
+CPS Architecture
+################
+
+.. toctree::
+   :maxdepth: 1
+
+
+High Level Component Definition and Architectural Relationships
+===============================================================
+
+The Configuration Persistence Service (CPS) provides storage for run-time configuration and operational
+parameters that need to be used by ONAP.
+
+In this release CPS is no longer a stand alone component and is released along with Cps-Temporal and the NCMP-DMI-Plugin.
+
+Project page describing eventual scope and ambition is here:
+`Configuration Persistence Service Project <https://wiki.onap.org/display/DW/Configuration+Persistence+Service+Project>`_
+
+This page reflects the state for Istanbul-R9 release.
+
+.. image:: _static/star.png
+    :class: float-left
+
+**Note:** SDC and AAI interfaces have not yet been implemented.
+
+.. image:: _static/cps-r9-arch-diagram.png
+
+API definitions
+===============
+
+Configuration Persistence Service provides the following interfaces.
+
+.. list-table::
+   :header-rows: 1
+
+   * - Interface name
+     - Interface definition
+     - Interface capabilities
+     - Protocol
+   * - CPS-E-01
+     - Administrative Data Management
+     - - create dataspace
+       - create/delete schema set
+       - create/delete anchor
+     - REST
+   * - CPS-E-02
+     - Generic Data Access
+     - - create data node
+       - read data node by xpath with or without descendants
+       - update data node by xpath with or without descendants
+     - REST
+   * - CPS-E-03
+     - Generic Data Search
+     - - query data nodes by xpath prefix and attribute value
+     - REST
+   * - CPS-E-04
+     - Change Notification
+     - - Kafka is used as the event messaging system
+       - running instance is supplied independently from any Kafka instance deployed from ONAP
+       - published events contain Timestamp, Dataspace, Schema set, Anchor and JSON Data Payload
+     - Kafka
+   * - CPS-E-05
+     - xNF Data Access
+     - - read xNF data
+       - query xNF data
+     - REST
+   * - CPS-E-06
+     - Temporal Data Access
+     - - data storage and access
+     - REST
+   * - CPS-E-07
+     - Admin
+     - - logging levels and configuration
+       - monitoring
+       - health including liveliness state and readiness state
+       - metrics through Prometheus
+     - Various
+
+The CPS Basic Concepts are described in :doc:`modeling`.